GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
        this.mc.renderEngine.bindTexture(new ResourceLocation(Mortero.MODID+":/textures/gui/mortero_gui.png"));
        int x = (width - xSize) / 2;
        int y = (height - ySize) / 2;
        this.drawTexturedModalRect(x, y, 0, 0, xSize, ySize);