HOLD [F10] while entering the codes listed below. To use the code after entering hold [F10] and press [F5]. To enter another code you must disable current code with hold [F10] and press [F6]. Now you can enter another code by repeating this procedure

Full Shield [F2] [F1] [F4] [F3]
Blue player turns black [F2] [F1] [F4] [F3] [F3] [F4] [F1] [F2]
Reload Weapon 0 [F2] [F4] [F1] [F3] [F1] [F3] [F4] [F2]
Reload Weapon 1 [F4] [F3] [F1] [F2] [F4] [F3] [F1] [F2]
Reload Weapon 2 [F2] [F1] [F2] [F4] [F2] [F1] [F3]