<Meta charset="UTF-8"> <Meta name="Description" content="">

var canvas=document.getElementById("canvas"); var context=canvas.getContext('2d'); //draw(); function draw(){ //得到当前系统的时分秒 var now=new Date(); var sec=now.getSeconds(); var min=now.getMinutes(); var hour=now.getHours(); hour>=12&&(hour=hour-12);

  var radius = Math.min(canvas.width/2,1000)
}