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animation.html
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animation.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>animation</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body,html{
margin:0px;
padding:0px;
}
</style>
<script>
window.onload = function(){
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
canvas.width=1000;
canvas.height=500;
document.body.appendChild(canvas);
ctx.fillStyle="black";
ctx.fillRect(0,0,canvas.width,canvas.height);
var posX = Math.random()*700;
var posY = Math.random()*400;
var dx = 5;
var dy = 5;
var a=2;
var x=30*Math.random() + 5;
// var y=20 * Math.random();
setInterval(function(){
ctx.fillStyle="#ff6473";
ctx.fillRect(0,0,canvas.width,canvas.height);
posX += dx;
posY += dy;
if(posY>500-x){
dy *= -0.8;
dx *= 0.9;
posY = 350;
posY=500-x;
}
dy += a;
if(posX>1000-x){
dx *= -1;
}
ctx.fillStyle="#5cc1b3";
// ctx.fillRect(posX,posY,x,x);
ctx.beginPath();
ctx.arc(posX,posY,x,0,Math.PI*2);
ctx.fill();
},30);
};
</script>
</head>
<body>
<canvas id="canvas">
</canvas>
</body>
</html>