                        课程
                    
                        /前端开发
                        
                            /Html5
                        
                        /炫丽的倒计时效果Canvas绘图与动画基础

生成的七巧板出现了问题，求解！

var tangram=[
  		{p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"#caff67"},
  		{p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"#67becf"},
  		{p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#ef3d61"},
  		{p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#f9f51a"},
  		{p:[{x:400,y:400},{x:600,y:600},{x:400,y:800}],color:"#a594c0"},
  		{p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:"#fa8ecc"},
  		{p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"#f6ca29"},
		];
		window.onload=function(){
			var canvas = document.getElementById("canvas");
			var context=canvas.getContext("2d");
			canvas.width=800;
			canvas.height=800;
			for(var i=0;i<tangram.length;i++){
				draw(tangram[i],context)
			}
		};
		function draw(piece,ctx){
			ctx.beginPath();
			ctx.moveTo(piece.p[0].x,piece.p[0].y);
			for(var i=1; i<piece.p.length;i++){
				ctx.lineTo(piece.p[i].x,piece.p[i].y);
			};
			ctx.closePath();
			ctx.fillStyle=piece.color;
			ctx.fill();
		}