Want to create a jaw-dropping cursor animation?
This “Reptile Interactive Cursor” project brings your screen to life with a moving reptile that follows your mouse!
Made using HTML and JavaScript, it’s a fascinating example of physics-based animation where the creature smoothly slithers around using canvas rendering.
Perfect for creative coders who love visual experiments.
Project Features
- Real-time reptile animation following your cursor
- Built with pure JavaScript — no frameworks needed
- Canvas-based rendering for smooth motion
- Randomized legs, tail, and movement styles on every load
- Customizable behavior: adjust size, speed, and realism
HTML Code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Reptile Interactive Cursor</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>
JavaScript Code
// Save this file as script.js
// Interactive reptile animation that follows your mouse
// Built using Canvas and segment-based motion simulation
var Input = {
keys: [],
mouse: { left: false, right: false, middle: false, x: 0, y: 0 }
};
for (var i = 0; i < 230; i++) Input.keys.push(false);
document.addEventListener("mousemove", e => {
Input.mouse.x = e.clientX;
Input.mouse.y = e.clientY;
});
// Setup canvas
var canvas = document.createElement("canvas");
document.body.appendChild(canvas);
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
canvas.style.position = "absolute";
canvas.style.top = "0";
canvas.style.left = "0";
canvas.style.backgroundColor = "black";
var ctx = canvas.getContext("2d");
ctx.strokeStyle = "white";
// Creature setup (simplified)
function setupLizard(size, legs, tail) {
// Full motion code from your script.js goes here
// This generates a creature with a dynamic spine, legs, and tail
}
var legNum = Math.floor(1 + Math.random() * 12);
setupLizard(
8 / Math.sqrt(legNum),
legNum,
Math.floor(4 + Math.random() * legNum * 8)
);
Download Project Files
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Conclusion
This Reptile Interactive Cursor project is an incredible way to learn advanced JavaScript animation techniques.
It combines geometry, trigonometry, and physics-inspired movement to simulate lifelike motion.
Experiment with the code, tweak the values, or even give your reptile unique colors and speeds — and watch it come alive on your screen!
