我的果实也没出来

var fruitObj = function(){

this.alive = [];

this.x=[];

this.y=[];

this.huang = new Image();

this.lan = new Image();

}

fruitObj.prototype.num = 30;

fruitObj.prototype.init = function(){

for(var i = 0; i < this.num; i++) {

this.alive[i]=true;

this.x[i] = 0;

this.y[i] = 0;

this.born(i);

}

this.huang.src="./src/fruit.png";

this.lan.src="./src/blue.png";

}

fruitObj.prototype.draw = function(){

for (var i = 0; i < this.num; i++) {

ctx2.drawImage(this.huang,this.x[i] - this.huang.width*0.5,this.y[i] - this.huang.height*0.5);

}

}

fruitObj.prototype.born = function(i){

var aneID =Math.floor( Math.random() * ane.num);

this.x = ane.x[aneID];

this.y = canHeight - ane.len[aneID];

}