<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
body{
background:pink;
}
#c1{
background:white;
}
</style>
<script>
window.onload = function ()
{
var oc = document.getElementById('c1');
var ogc = oc.getContext('2d');
function toDraw()
{
var x = 200;
var y = 200;
var r = 150;
ogc.clearRect(0,0,oc.width,oc.height);
var aDate = new Date();
var oHouse = aDate.getHours();
var oMin = aDate.getMinutes();
var oSen = aDate.getSeconds();
var oHoursevalue = ( -90 + oHouse*30 + oMin/2)*Math.PI/180;
var oMinvalue = ( -90 + oMin*6 )*Math.PI/180;
var oSenvalue = ( -90 + oSen*6)*Math.PI/180;
ogc.beginPath();
for(var i = 0; i < 60; i++)
{
ogc.moveTo(x,y);
ogc.arc(x,y,r,6*i*Math.PI/180,6*(i+1)*Math.PI/180,false);
ogc.stroke();
}
ogc.closePath();
ogc.beginPath();
ogc.fillStyle = 'white';
ogc.moveTo(x,y);
ogc.arc(x,y,r*19/20,0,360,false);
ogc.fill();
ogc.closePath();
ogc.beginPath();
ogc.lineWidth = 3
for(var i = 0; i < 12; i++)
{
ogc.moveTo(x,y);
ogc.arc(x,y,r,30*i*Math.PI/180,30*(i+1)*Math.PI/180,false);
ogc.stroke();
}
ogc.closePath();
ogc.beginPath();
ogc.fillStyle = 'white';
ogc.moveTo(x,y);
ogc.arc(x,y,r*18/20,0,360,false);
ogc.fill();
ogc.closePath();
ogc.beginPath();
ogc.lineWidth = 5
ogc.moveTo(x,y);
ogc.arc(x,y,r*5/20,oHoursevalue,oHoursevalue,false);
ogc.stroke();
ogc.closePath();
ogc.beginPath();
ogc.lineWidth = 3
ogc.moveTo(x,y);
ogc.arc(x,y,r*8/20,oMinvalue,oMinvalue,false);
ogc.stroke();
ogc.closePath();
ogc.beginPath();
ogc.lineWidth = 1
ogc.moveTo(x,y);
ogc.arc(x,y,r*18/20,oSenvalue,oSenvalue,false);
ogc.stroke();
ogc.closePath();
}
toDraw();
setInterval(toDraw,1000);
}
</script>
</head>
<body>
<canvas id="c1" width="400" height="400"></canvas>
</body>
</html>
