Fill hitarea with rectangular graphics in pixi js

fill-hitarea.js

for (var i = 0; i < 4; i++) {
        var x1 = this.dropParams.position[i * 2],
            y1 = this.dropParams.position[i * 2 + 1],
            x2 = this.dropParams.position[i * 2] + this.dropParams.w,
            y2 = this.dropParams.position[i * 2 + 1] + this.dropParams.h;

        var otherObject = new PIXI.DisplayObjectContainer();
        var graphics = new PIXI.Graphics();
        graphics.beginFill(0xFFFFFF, 0.5);
        graphics.lineStyle(1, 0x000000, 0.5);
        graphics.drawRect(x1, y1, this.dropParams.w, this.dropParams.h);
        otherObject.addChild(graphics);
        this.introContainer.addChild(otherObject);

    }