Gui Furnace Chest

public class GuiFurnaceChest extends GuiContainer {

    public GuiFurnaceChest(EntityPlayer player, World w, int x, int y, int z) {
        super(player.inventoryContainer);

    }

    @Override
    protected void drawGuiContainerBackgroundLayer(float par1, int par2,
                    int par3) {
            //draw your Gui here, only thing you need to change is the path
            GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
            this.mc.renderEngine.bindTexture("/gui/container.png");
            /*drawTexturedModalRect( Xpos, Ypos, U, V, Width, Height */
            this.drawTexturedModalRect(this.xSize / 2, this.ySize / 2, 0, 0, this.xSize, this.ySize);

    }

}