var aneObj = function()
{
this.x = [];
this.len = [];
}
aneObj.prototype.num =50;
aneObj.prototype.init = function()
{
for (var i = 0; i < this.num; i++) {
this.x[i] = i * 16 + Math.random() * 20;//[0,1)
this.len[i] = 200 + Math.random() * 50;
}
}
aneObj.prototype.draw = function()
{
ctx2.save();
ctx2.globalAlbha = 0.6;
for (var i = 0; i < this.num; i++) {
//beginPath,moveTo,linTo,stroke,starokeStyle,linewidth,lineCap,globalAlbha
ctx2.beginPath();
ctx2.moveTo(this.x[i],canHeight);
ctx2.lineTo(this.x[i],canHeight - this.len[i]);
ctx2.lineWidth = 20;
ctx2.lineCap = "round";
ctx2.starokeStyle = "#3b154e";
ctx2.stroke();
}
ctx2.restore();
}