backup2.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Babylon.js Game Example</title>
    <script src="https://cdn.babylonjs.com/babylon.js"></script>
    <script src="https://cdn.babylonjs.com/loaders/babylonjs.loaders.min.js"></script>
    <style>
        canvas {
            width: 100%;
            height: 100%;
            touch-action: none;
        }
    </style>
</head>
<body>
    <canvas id="renderCanvas"></canvas>
    <script>
        window.addEventListener('DOMContentLoaded', function () {
            var canvas = document.getElementById('renderCanvas');
            var engine = new BABYLON.Engine(canvas, true);

            var createScene = function () {
                var scene = new BABYLON.Scene(engine);

                // Create a camera
                var camera = new BABYLON.ArcRotateCamera("Camera", 0, 0, 10, BABYLON.Vector3.Zero(), scene);

                // Create a light
                var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);

                // Create an array to hold the spheres
                var spheres = [];

                // Create a fountain of spheres that follow the mouse
                canvas.addEventListener('mousemove', function (event) {
                    // Create a new sphere
                    var sphere = BABYLON.MeshBuilder.CreateSphere("sphere", {diameter: Math.random() * 2 + 0.5}, scene);
                    sphere.position = new BABYLON.Vector3(Math.random() * 4 - 2, Math.random() * 4 - 2, Math.random() * 4 - 2);
                    spheres.push(sphere);

                    // Follow the mouse with the spheres
                    var ray = scene.createPickingRay(event.clientX, event.clientY, BABYLON.Matrix.Identity(), camera);
                    var pickInfo = scene.pickWithRay(ray, function (mesh) { return mesh == sphere; });
                    if (pickInfo.hit) {
                        sphere.position.copyFrom(pickInfo.pickedPoint);
                    }

                    // Animate the spheres
                    var animation = new BABYLON.Animation("myAnimation", "position.y", 30, BABYLON.Animation.ANIMATIONTYPE_FLOAT, BABYLON.Animation.ANIMATIONLOOPMODE_CYCLE);
                    var keys = [];
                    keys.push({frame: 0, value: sphere.position.y});
                    keys.push({frame: 50, value: sphere.position.y + 2});
                    keys.push({frame: 100, value: sphere.position.y});
                    animation.setKeys(keys);
                    sphere.animations.push(animation);
                    scene.beginAnimation(sphere, 0, 100, true);
                });

                return scene;
            }

            var scene = createScene();

            engine.runRenderLoop(function () {
                scene.render();
            });

            window.addEventListener('resize', function () {
                engine.resize();
            });
        });
    </script>
</body>
</html>