color2.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Color Animation</title>
    <style>
        body {
            margin: 0;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            font-family: Arial, sans-serif;
            transition: background-color 0.5s;
        }
        h1 {
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
        }
    </style>
</head>
<body>
    <h1>Color Change Animation</h1>
    <script>
        const A = 0.5; // Baseline color value (in RGB)
        const B = 0.5; // Amplitude (max variation)
        const C = 2;   // Frequency
        const D = 0;   // Phase shift
        
        let x = 0; // Initial value for x

        function calculateColor(x) {
            // Calculate color value based on the equation
            const colorValue = A + B * Math.cos(2 * Math.PI * (C * x + D));
            return Math.floor(colorValue * 255); // Scale to 0-255 for RGB
        }

        function updateBackgroundColor() {
            // Get the color value
            const red = calculateColor(x);
            const green = calculateColor(x + 0.333); // Offset for green
            const blue = calculateColor(x + 0.666); // Offset for blue

            // Update the body's background color
            document.body.style.backgroundColor = `rgb(${red}, ${green}, ${blue})`;

            // Increment x for animation
            x += 0.01;
            requestAnimationFrame(updateBackgroundColor);
        }

        // Start the animation
        updateBackgroundColor();
    </script>
</body>
</html>