模仿老师制作的爱心鱼小游戏

    
 
 
 

     #canvasbox
     {
  position:relative;
  width:800px;
  height:600px;
  margin:0px auto;
     }
     #canvas1
     {
  position:absolute;
  left:0px;
  bottom:0px;
  z-index:1;
     }
     #canvas2
     {
  position:absolute;
  left:0px;
  bottom:0px;
  z-index:0;
     }