guiBackpack.addSubPart(guiSlot);
}
if(!backpack.isIntelligent()) {
// arrow
guiBackpack.addSubPart(new Icon(0, 238, 90, 35, 22, 15));
// clear button
Button btn_clear = new Button(0, 88, 16, 11, 11, "c");
guiBackpack.addSubPart(btn_clear);
} else {
Button btn_clear = new Button(0, 66, 16, 11, 11, "c");