As you continue down the corridor, you come across a door and panel, clearly left untouched for many years. Hoping to get lucky, you try the door but it is locked. On the panel is a line of 6 buttons, colored RED, ORANGE, YELLOW, GREEN, BLUE, and PURPLE. As you search, you notice writing in the dust. You can faintly make out what appears to be:
IPF S: GPIFV PIU PFD CR N PL F PUPI
How do you proceed?