Epilepsy_Test/tunnel.html at main · alexanderdfox/Epilepsy_Test · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Tunnel Vision</title>
	<style>
		body {
			margin: 0;
			padding: 0;
			overflow: hidden;
			background-color: black;
			font-family: Arial, sans-serif;
		}

		/* Spinner shape layout with rotation animation */
		.spinner {
			position: fixed;
			overflow: hidden;
			display: block; /* Always visible */
		}

		.spinner.top-left { top: 0; left: 0; width: 50%; height: 50%; transform: rotate(-30deg); animation: spin-cc 0.1s ease-in-out infinite; }
		.spinner.top-right { top: 0; right: 0; width: 50%; height: 50%; transform: rotate(30deg); animation: spin-cc 0.1s ease-in-out infinite; }
		.spinner.bottom-left { bottom: 0; left: 0; width: 50%; height: 50%; transform: rotate(30deg); animation: spin-cc 0.1s ease-in-out infinite; }
		.spinner.bottom-right { bottom: 0; right: 0; width: 50%; height: 50%; transform: rotate(-30deg); animation: spin-cc 0.1s ease-in-out infinite; }
		.spinner.center-middle {
			top: 25%;
			left: 25%;
			width: 50%;
			height: 50%;
			transform: translate(50%, 50%) rotate(-30deg);
			animation: spin-ccw 0.1s ease-in-out infinite;
		}

		@keyframes spin-cc {
			from { transform: rotate(0deg); }
			to { transform: rotate(360deg); }
		}

		@keyframes spin-ccw {
			from { transform: rotate(360deg); }
			to { transform: rotate(0deg); }
		}

		canvas {
			width: 100%;
			height: 100%;
		}
	</style>
</head>
<body>

	<!-- Fidget spinner layout with five canvases -->
	<div class="spinner top-left"><canvas id="canvas1"></canvas></div>
	<div class="spinner top-right"><canvas id="canvas2"></canvas></div>
	<div class="spinner bottom-left"><canvas id="canvas3"></canvas></div>
	<div class="spinner bottom-right"><canvas id="canvas4"></canvas></div>
	<div class="spinner center-middle"><canvas id="canvas5"></canvas></div>

	<script>
		const canvasElements = [
			document.getElementById('canvas1'),
			document.getElementById('canvas2'),
			document.getElementById('canvas3'),
			document.getElementById('canvas4'),
			document.getElementById('canvas5')
		];

		let scale = 1;
		let scaleIncrement = 0.01;

		function getRandomColor() {
			const r = Math.floor(Math.random() * 256);
			const g = Math.floor(Math.random() * 256);
			const b = Math.floor(Math.random() * 256);
			return `rgb(${r}, ${g}, ${b})`;
		}

		function setupCanvas(canvas) {
			const ctx = canvas.getContext('2d');
			canvas.width = canvas.clientWidth;
			canvas.height = canvas.clientHeight;

			const centerX = canvas.width / 2;
			const centerY = canvas.height / 2;

			function fibonacci(n) {
				let fibSequence = [0, 1];
				for (let i = 2; i < n; i++) {
					fibSequence.push(fibSequence[i - 1] + fibSequence[i - 2]);
				}
				return fibSequence;
			}

			function drawFibonacciSpiral() {
				const fibNumbers = fibonacci(20);
				let angle = 0;

				ctx.clearRect(0, 0, canvas.width, canvas.height);
				ctx.save();
				ctx.translate(centerX, centerY);
				ctx.scale(scale, scale);

				for (let i = 2; i < fibNumbers.length; i++) {
					let radius = fibNumbers[i] * 10;
					ctx.beginPath();
					ctx.arc(0, 0, radius, angle, 360);
					ctx.lineWidth = 3;
					ctx.strokeStyle = getRandomColor();
					ctx.stroke();
					angle += Math.PI / 2;
				}

				ctx.restore();
				scale += scaleIncrement;
				if (scale > 3 || scale < 1) scaleIncrement *= -1;
			}

			function animate() {
				drawFibonacciSpiral();
				requestAnimationFrame(animate);
			}

			animate();
		}

		canvasElements.forEach(canvas => setupCanvas(canvas));
	</script>
</body>
</html>