效果如下：
代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<title>Canvas</title>
<style type=text/css>
*{
margin: 0;
padding: 0;
}
html, body{
height: 100%;
}
#myCanvas{
background-color: #87CEEB;
}
</style>
</head>
<body>
<canvas id=myCanvas width=1000 height=600>您的浏览
