new function() {
    var className = 'BackGround';
    window[className] = (function() {
        Laya.class(Class, className, Laya.Sprite);

        function Class() {
            Class.super(this);

            // this定义..

            this.init();
        }
        Class.prototype.init = function() {
            console.log(this);
        };

        return Class;
    })();
}




var __extends = (this && this.__extends) || function(d, b) {
    for (var p in b) {
        (b.hasOwnProperty(p)) && (d[p] = b[p]);
    }
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};

var BackGround = (function() {
    __extends(Class, Laya.Sprite);

    function Class() {
        Laya.Sprite.call(this);
        this.img = [];
        this.init();
    }
    Class.prototype.init = function() {
        Laya.stage.addChild(this);
        this.bg();
        Laya.timer.frameLoop(1, this, this.loop);
    };
    Class.prototype.bg = function() {
        for (var i = 0; i < 2; i++) {
            this.img[i] = new Laya.Image('background.png');
            this.addChild(this.img[i]);
        }
        this.img[0].y = 0;
        this.img[1].y = -852;
    }
    Class.prototype.loop = function() {
        for (var i = 0; i < this.img.length; i++) {
            this.img[i].y += 1;
            if (this.img[i].y >= 852) {
                this.img[i].y = -852;
            }
        }
    };
    return Class;
}());


new function() {
    var className = 'BackGround';
    window[className] = (function() {
        Laya.class(Class, className, Laya.Sprite);

        function Class() {
            Class.super(this);

            this.img = [];

            this.init();
        }
        Class.prototype.init = function() {
            Laya.stage.addChild(this);
            this.bg();
            Laya.timer.frameLoop(1, this, this.loop);
        };
        Class.prototype.bg = function() {
            for (var i = 0; i < 2; i++) {
                this.img[i] = new Laya.Image('background.png');
                this.addChild(this.img[i]);
            }
            this.img[0].y = 0;
            this.img[1].y = -852;
        }
        Class.prototype.loop = function() {
            for (var i = 0; i < this.img.length; i++) {
                this.img[i].y += 1;
                if (this.img[i].y >= 852) {
                    this.img[i].y = -852;
                }
            }
        };
        return Class;
    })();
}




Laya.init(400, 852, Laya.WebGL);


// new BackGround();
new BackGround();