diff --git a/tools/animation-workbench/app/components/FileButton/index.tsx b/tools/animation-workbench/app/components/FileButton/index.tsx
index 7e6f644..804d862 100644
--- a/tools/animation-workbench/app/components/FileButton/index.tsx
+++ b/tools/animation-workbench/app/components/FileButton/index.tsx
@@ -9,7 +9,7 @@ export const FileButton = forwardRef<HTMLInputElement, FileButtonProps>(({
   children,
   ...etcProps
 }, ref) => (
-  <label>
+  <label className="contents">
     <input
       {...etcProps}
       ref={ref}
diff --git a/tools/animation-workbench/app/routes/index.tsx b/tools/animation-workbench/app/routes/index.tsx
index 9a8d385..40a9c03 100644
--- a/tools/animation-workbench/app/routes/index.tsx
+++ b/tools/animation-workbench/app/routes/index.tsx
@@ -3,7 +3,6 @@ import {
 	FormEventHandler,
 	MouseEventHandler,
 	useEffect,
-	useId,
 	useRef,
 	useState,
 } from 'react';
@@ -40,7 +39,6 @@ const useAnimationForm = () => {
 	const [enabledGroupIds, setEnabledGroupIds] = useState<string[]>();
 	const [savedSvgKeyframes, setSavedSvgKeyframes] = useState<Keyframe[]>();
 
-	const svgAnimationIdsListId = useId();
 	const svgPreviewRef = useRef<HTMLDivElement>(null);
 
 	const loadSvgFile: ChangeEventHandler<HTMLInputElement> = async (e) => {
@@ -68,7 +66,7 @@ const useAnimationForm = () => {
 		});
 	}
 
-	const proposeNewAnimationId: FormEventHandler<HTMLInputElement> = (e) => {
+	const proposeNewAnimationId: FormEventHandler<HTMLInputElement> = () => {
 		setIsNewAnimationId(true);
 	}
 
@@ -80,17 +78,16 @@ const useAnimationForm = () => {
 		})
 	}
 
-	useEffect(() => {
+	const onLoaded = (loadedFileContents?: string, svgPreviewRefCurrent?: HTMLElement | null) => {
 		if (!loadedFileContents) {
 			return
 		}
 
-		if (!svgPreviewRef.current) {
+		if (!svgPreviewRefCurrent) {
 			return
 		}
 
-		const svgPreviewRoot = svgPreviewRef.current.children[0];
-
+		const svgPreviewRoot = svgPreviewRefCurrent.children[0];
 		setSvgAnimations(['default']);
 		setSvgGroups(
 			Array
@@ -103,6 +100,10 @@ const useAnimationForm = () => {
 		setCurrentAnimationId('default');
 		setEnabledGroupIds([]); // TODO - compute enabled groupIds based on current animation id
 		setSavedSvgKeyframes([]); // TODO - load keyframes from file
+	}
+
+	useEffect(() => {
+		onLoaded(loadedFileContents, svgPreviewRef.current);
 	}, [loadedFileContents, svgPreviewRef.current]);
 
 	const focusAnimationIdInput: FocusEventHandler<HTMLInputElement> = (e) => {
@@ -123,40 +124,7 @@ const useAnimationForm = () => {
 		setEnabledGroupIds((oldEnabledGroupIds = []) => oldEnabledGroupIds.filter((i) => i !== currentTarget.value));
 	}
 
-	const translateXGroup = (group: SvgGroup): ChangeEventHandler<HTMLInputElement> => (e) => {
-		const { current: svgPreviewWrapper } = svgPreviewRef;
-		if (!svgPreviewWrapper) {
-			return;
-		}
-
-		const svgPreviewRoot = svgPreviewWrapper.children[0] as SVGSVGElement | null;
-		if (!svgPreviewRoot) {
-			return;
-		}
-
-		const targetGroup = Array.from(svgPreviewRoot.children).find(g => g.id === group.id) as SVGGraphicsElement;
-		if (!targetGroup) {
-			return;
-		}
-
-		const rotationCenterReference = Array.from(targetGroup.children).find(e => e.tagName === 'circle') as SVGCircleElement | undefined
-		const rotationCenter = {
-			cx: rotationCenterReference?.getAttribute?.('cx') ?? 0,
-			cy: rotationCenterReference?.getAttribute?.('cy') ?? 0,
-		};
-
-		const values = getFormValues(e.currentTarget.form!, { forceNumberValues: true });
-		const changed = Array.isArray(values.changed) ? values.changed : [values.changed];
-		const changedIndex = changed.indexOf(group.id);
-		const rotate = Array.isArray(values.rotate) ? values.rotate : [values.rotate];
-		const translateY = Array.isArray(values.translateY) ? values.translateY : [values.translateY];
-		const currentRotate = rotate[changedIndex];
-		const currentTranslateX = e.currentTarget.value;
-		const currentTranslateY = translateY[changedIndex];
-		targetGroup.setAttribute('transform', `translate(${currentTranslateX} ${currentTranslateY}) rotate(${currentRotate} ${rotationCenter.cx} ${rotationCenter.cy})`);
-	}
-
-	const translateYGroup = (group: SvgGroup): ChangeEventHandler<HTMLInputElement> => (e) => {
+	const handleAttributeValueChange = (group: SvgGroup): ChangeEventHandler<HTMLInputElement> => (e) => {
 		const { current: svgPreviewWrapper } = svgPreviewRef;
 		if (!svgPreviewWrapper) {
 			return;
@@ -178,82 +146,26 @@ const useAnimationForm = () => {
 			cy: rotationCenterReference?.getAttribute?.('cy') ?? 0,
 		};
 
-		const values = getFormValues(e.currentTarget.form!, { forceNumberValues: true });
+		const form = e.currentTarget.form as HTMLFormElement
+		const values = getFormValues(form, { forceNumberValues: true });
 		const changed = Array.isArray(values.changed) ? values.changed : [values.changed];
 		const changedIndex = changed.indexOf(group.id);
 		const rotate = Array.isArray(values.rotate) ? values.rotate : [values.rotate];
-		const translateX = Array.isArray(values.translateX) ? values.translateX : [values.translateX];
-		const currentRotate = rotate[changedIndex];
-		const currentTranslateX = translateX[changedIndex];
-		const currentTranslateY = e.currentTarget.value;
-		targetGroup.setAttribute('transform', `translate(${currentTranslateX} ${currentTranslateY}) rotate(${currentRotate} ${rotationCenter.cx} ${rotationCenter.cy})`);
-	}
-
-	const rotateGroup = (group: SvgGroup): ChangeEventHandler<HTMLInputElement> => (e) => {
-		const { current: svgPreviewWrapper } = svgPreviewRef;
-		if (!svgPreviewWrapper) {
-			return;
-		}
-
-		const svgPreviewRoot = svgPreviewWrapper.children[0] as SVGSVGElement | null;
-		if (!svgPreviewRoot) {
-			return;
-		}
-
-		const targetGroup = Array.from(svgPreviewRoot.children).find(g => g.id === group.id) as SVGGraphicsElement;
-		if (!targetGroup) {
-			return;
-		}
-
-		const rotationCenterReference = Array.from(targetGroup.children).find(e => e.tagName === 'circle') as SVGCircleElement | undefined
-		const rotationCenter = {
-			cx: rotationCenterReference?.getAttribute?.('cx') ?? 0,
-			cy: rotationCenterReference?.getAttribute?.('cy') ?? 0,
-		};
-
-		const values = getFormValues(e.currentTarget.form!, { forceNumberValues: true });
-		setFormValues(e.currentTarget.form!, { rotateNumber: values.rotate });
-		const changed = Array.isArray(values.changed) ? values.changed : [values.changed];
-		const changedIndex = changed.indexOf(group.id);
+		const rotateNumber = Array.isArray(values.rotateNumber) ? values.rotateNumber : [values.rotateNumber];
 		const translateX = Array.isArray(values.translateX) ? values.translateX : [values.translateX];
 		const translateY = Array.isArray(values.translateY) ? values.translateY : [values.translateY];
-		const currentRotate = e.currentTarget.value;
-		const currentTranslateX = translateX[changedIndex];
-		const currentTranslateY = translateY[changedIndex];
-		targetGroup.setAttribute('transform', `translate(${currentTranslateX} ${currentTranslateY}) rotate(${currentRotate} ${rotationCenter.cx} ${rotationCenter.cy})`);
-	}
-
-	const rotateGroupThroughNumber = (group: SvgGroup): ChangeEventHandler<HTMLInputElement> => (e) => {
-		const { current: svgPreviewWrapper } = svgPreviewRef;
-		if (!svgPreviewWrapper) {
-			return;
-		}
-
-		const svgPreviewRoot = svgPreviewWrapper.children[0] as SVGSVGElement | null;
-		if (!svgPreviewRoot) {
-			return;
-		}
-
-		const targetGroup = Array.from(svgPreviewRoot.children).find(g => g.id === group.id) as SVGGraphicsElement;
-		if (!targetGroup) {
-			return;
+		const currentRotate = e.currentTarget.name.startsWith('rotate') ? e.currentTarget.valueAsNumber : rotate[changedIndex];
+		const currentTranslateX = e.currentTarget.name.startsWith('translateX') ? e.currentTarget.valueAsNumber : translateX[changedIndex];
+		const currentTranslateY = e.currentTarget.name.startsWith('translateY') ? e.currentTarget.valueAsNumber : translateY[changedIndex];
+		if (e.currentTarget.name === 'rotate') {
+			setFormValues(form, {
+				rotateNumber: rotate,
+			})
+		} else if (e.currentTarget.name === 'rotateNumber') {
+			setFormValues(form, {
+				rotate: rotateNumber,
+			})
 		}
-
-		const rotationCenterReference = Array.from(targetGroup.children).find(e => e.tagName === 'circle') as SVGCircleElement | undefined
-		const rotationCenter = {
-			cx: rotationCenterReference?.getAttribute?.('cx') ?? 0,
-			cy: rotationCenterReference?.getAttribute?.('cy') ?? 0,
-		};
-
-		const values = getFormValues(e.currentTarget.form!, { forceNumberValues: true });
-		setFormValues(e.currentTarget.form!, { rotate: values.rotateNumber });
-		const changed = Array.isArray(values.changed) ? values.changed : [values.changed];
-		const changedIndex = changed.indexOf(group.id);
-		const translateX = Array.isArray(values.translateX) ? values.translateX : [values.translateX];
-		const translateY = Array.isArray(values.translateY) ? values.translateY : [values.translateY];
-		const currentRotate = e.currentTarget.value;
-		const currentTranslateX = translateX[changedIndex];
-		const currentTranslateY = translateY[changedIndex];
 		targetGroup.setAttribute('transform', `translate(${currentTranslateX} ${currentTranslateY}) rotate(${currentRotate} ${rotationCenter.cx} ${rotationCenter.cy})`);
 	}
 
@@ -304,19 +216,48 @@ const useAnimationForm = () => {
 
 	const updateTime: ChangeEventHandler<HTMLInputElement> = (e) => {
 		const value = e.currentTarget.valueAsNumber;
-		const form = e.currentTarget.form as HTMLFormElement
+		const form = e.currentTarget.form as HTMLFormElement;
+		const theSavedSvgKeyframes = savedSvgKeyframes ?? [];
+		const sortedSavedSvgKeyframes = theSavedSvgKeyframes.sort((k1, k2) => k1.time - k2.time);
+		const previousKeyframe =
+			[...sortedSavedSvgKeyframes].reverse().find((k) => k.time <= value)
+			?? sortedSavedSvgKeyframes[0];
+		const nextKeyframe =
+			sortedSavedSvgKeyframes.find((k) => k.time > value)
+			?? sortedSavedSvgKeyframes.slice(-1)[0];
 		const keyframe = savedSvgKeyframes?.find((k) => k.time === value);
+		const hasKeyframeRange = (previousKeyframe || nextKeyframe);
 		if (!keyframe) {
-			setEnabledGroupIds([]);
-			setFormValues(form, {
+			setEnabledGroupIds(svgGroups?.map(g => g.id));
+			// todo interpolate across individual keyframes
+			//   get previous keyframe with respect to group
+			//   get next keyframe with respect to group
+			//   |----------------|
+			//   |-----|
+
+			const interpolatedKeyframe = previousKeyframe;
+			const interpolatedValues = {
 				changed: svgGroups?.map(() => false),
-				translateX: svgGroups?.map(() => 0),
-				translateY: svgGroups?.map(() => 0),
-				rotate: svgGroups?.map(() => 0),
-				rotateNumber: svgGroups?.map(() => 0),
-			})
+				translateX: svgGroups?.map((g) => {
+					if (!hasKeyframeRange) {
+						return 0;
+					}
+				})
+			}
+			setTimeout(() => {
+				// todo set interpolation
+				setFormValues(form, {
+					changed: svgGroups?.map(() => false),
+					translateX: svgGroups?.map(() => 0),
+					translateY: svgGroups?.map(() => 0),
+					rotate: svgGroups?.map(() => 0),
+					rotateNumber: svgGroups?.map(() => 0),
+				});
+				setEnabledGroupIds([]);
+			});
 			return;
 		}
+
 		const changed = keyframe.attributes.map((a) => a.group.id);
 		setEnabledGroupIds(changed);
 		setTimeout(() => {
@@ -338,7 +279,6 @@ const useAnimationForm = () => {
 		loadSvgFile,
 		svgPreviewRef,
 		svgGroups,
-		svgAnimationIdsListId,
 		selectNewAnimationId,
 		proposeNewAnimationId,
 		cancelAnimationIdChange,
@@ -346,10 +286,7 @@ const useAnimationForm = () => {
 		blurAnimationIdInput,
 		addKeyframeAttribute,
 		enabledGroupIds,
-		rotateGroup,
-		rotateGroupThroughNumber,
-		translateXGroup,
-		translateYGroup,
+		handleAttributeValueChange,
 		handleFormSubmit,
 		savedSvgKeyframes,
 		updateTime,
@@ -364,7 +301,6 @@ const IndexPage = () => {
 		svgPreviewRef,
 		svgGroups,
 		svgAnimations,
-		svgAnimationIdsListId,
 		selectNewAnimationId,
 		proposeNewAnimationId,
 		isNewAnimationId,
@@ -373,10 +309,7 @@ const IndexPage = () => {
 		blurAnimationIdInput,
 		addKeyframeAttribute,
 		enabledGroupIds,
-		rotateGroup,
-		rotateGroupThroughNumber,
-		translateXGroup,
-		translateYGroup,
+		handleAttributeValueChange,
 		handleFormSubmit,
 		savedSvgKeyframes,
 		updateTime,
@@ -384,9 +317,6 @@ const IndexPage = () => {
 
 	return (
 		<form className="lg:fixed lg:w-full lg:h-full flex flex-col" onSubmit={handleFormSubmit}>
-			<datalist id="translationTickMarks">
-				<option value="0">0</option>
-			</datalist>
 			<datalist id="rotationTickMarks">
 				<option value="-360">-360</option>
 				<option value="-270">-270</option>
@@ -507,12 +437,24 @@ const IndexPage = () => {
 							</div>
 							<div
 								style={{
-									width: 560
+									width: 700
 								}}
 							>
 								{
 									Array.isArray(svgGroups) && (
-										<>
+										<div className="grid grid-cols-10">
+											<div className="col-span-4">
+												Group
+											</div>
+											<div>
+												X
+											</div>
+											<div>
+												Y
+											</div>
+											<div className="col-span-4">
+												Rotate
+											</div>
 											{svgGroups.map((group) => {
 												return (
 													<fieldset
@@ -522,88 +464,84 @@ const IndexPage = () => {
 														<legend className="sr-only">
 															{group.name}
 														</legend>
-														<div className="flex">
-															<div className="flex-auto">
-																<label
-																	className="whitespace-nowrap"
-																>
-																	<input type="checkbox" name="changed" value={group.id} onChange={addKeyframeAttribute} />
-																	{' '}
-																	<span>
-																		{group.name}
-																	</span>
-																</label>
-															</div>
-															<label
-																className="w-16 block"
-															>
-																<span className="sr-only">Translate X</span>
-																<input
-																	className="w-full block text-right"
-																	type="number"
-																	name="translateX"
-																	min="-360" max="360"
-																	defaultValue="0"
-																	step="any"
-																	disabled={!enabledGroupIds?.includes(group.name)}
-																	onChange={translateXGroup(group)}
-																	list="translationTickMarks"
-																/>
-															</label>
-															<label
-																className="w-16 block"
-															>
-																<span className="sr-only">Translate Y</span>
-																<input
-																	className="w-full block text-right"
-																	type="number"
-																	name="translateY"
-																	min="-360" max="360"
-																	defaultValue="0"
-																	step="any"
-																	disabled={!enabledGroupIds?.includes(group.name)}
-																	onChange={translateYGroup(group)}
-																	list="translationTickMarks"
-																/>
-															</label>
-															<label
-																className="w-40 block"
-															>
-																<span className="sr-only">Rotate</span>
-																<input
-																	className="w-full block"
-																	type="range"
-																	name="rotate"
-																	min="-360"
-																	max="360"
-																	defaultValue="0"
-																	step="5"
-																	disabled={!enabledGroupIds?.includes(group.name)}
-																	onChange={rotateGroup(group)}
-																	list="rotationTickMarks"
-																/>
-															</label>
+														<div className="col-span-4">
 															<label
-																className="w-12 block"
+																className="whitespace-nowrap"
 															>
-																<span className="sr-only">Rotate</span>
-																<input
-																	className="w-full block text-right"
-																	type="number"
-																	name="rotateNumber"
-																	min="-360"
-																	max="360"
-																	defaultValue="0"
-																	step="5"
-																	disabled={!enabledGroupIds?.includes(group.name)}
-																	onChange={rotateGroupThroughNumber(group)}
-																/>
+																<input type="checkbox" name="changed" value={group.id} onChange={addKeyframeAttribute} />
+																{' '}
+																<span>
+																	{group.name}
+																</span>
 															</label>
 														</div>
+														<label
+															className="block"
+														>
+															<span className="sr-only">Translate X</span>
+															<input
+																className="w-full block text-right"
+																type="number"
+																name="translateX"
+																min="-360" max="360"
+																defaultValue="0"
+																step="any"
+																disabled={!enabledGroupIds?.includes(group.name)}
+																onChange={handleAttributeValueChange(group)}
+															/>
+														</label>
+														<label
+															className="block"
+														>
+															<span className="sr-only">Translate Y</span>
+															<input
+																className="w-full block text-right"
+																type="number"
+																name="translateY"
+																min="-360" max="360"
+																defaultValue="0"
+																step="any"
+																disabled={!enabledGroupIds?.includes(group.name)}
+																onChange={handleAttributeValueChange(group)}
+															/>
+														</label>
+														<label
+															className="block col-span-3"
+														>
+															<span className="sr-only">Rotate</span>
+															<input
+																className="w-full block"
+																type="range"
+																name="rotate"
+																min="-360"
+																max="360"
+																defaultValue="0"
+																step="5"
+																disabled={!enabledGroupIds?.includes(group.name)}
+																onChange={handleAttributeValueChange(group)}
+																list="rotationTickMarks"
+															/>
+														</label>
+														<label
+															className="block"
+														>
+															<span className="sr-only">Rotate</span>
+															<input
+																className="w-full block text-right"
+																type="number"
+																name="rotateNumber"
+																min="-360"
+																max="360"
+																defaultValue="0"
+																step="5"
+																disabled={!enabledGroupIds?.includes(group.name)}
+																onChange={handleAttributeValueChange(group)}
+															/>
+														</label>
 													</fieldset>
 												)
 											})}
-										</>
+										</div>
 									)
 								}
 							</div>