var shine = new Shine(document.getElementById('my-shine-object'));

shine.light.position.x = window.innerWidth * 0.5;
shine.light.position.y = window.innerHeight * 0.5;
shine.draw(); // 一定要重新绘制

shine.config.opacity = 0.1;
shine.config.blur = 0.2;
shine.draw(); //一定要重新绘制

//所有的参数都是可选的，可以在以后改变
var config = new shinejs.Config({
  numSteps: 4,
  opacity: 0.2,
  shadowRGB: new shinejs.Color(255, 0, 0)
});

var shineA = new Shine(document.getElementById('my-shine-object-a'), config);
var shineB = new Shine(document.getElementById('my-shine-object-b'), config);

var shineC = new Shine(document.getElementById('my-shine-object-c'));
shineC.config = config;
shineC.draw(); //一定要重新绘制