kinetic中的矩形填充颜色

Question

我使用Kinetic.Line创建了一个矩形。我想用colour填充。但它不起作用。任何人都可以帮忙吗？

var square1 = new Kinetic.Line({
    x:10,
    y: stage.getHeight()*0.5,
    points: [0,0,0,30,30,30,30,0,0,0],
    id:"object3",       
    fill:'green',
    stroke: 'black',
    strokeWidth: 2,
    draggable:true,
    closed: true,
    dragBoundFunc: function(pos) {
        return {
          x: pos.x,
          y: this.getAbsolutePosition().y
        }
    }   
 });