On the Subject of 3×3 Grid

If there’s nothing here then do I do nothing or do everything?

• A random combination of LEDs will appear on the 3x3 display to the left of the timer.*
• If the last digit of the serial number is even, enter that combination onto the large 3×3 keypad.
• If the last digit of the serial number is odd, enter the combination onto the large 3×3 keypad, but toggle the state of each button.
• • Example: If the grid in the top-left has every square except the middle one on, only turn the middle one on for the actual input.
• Make sure you have the proper input on the keypad by the time the timer runs out. If the timer runs out and the combination is wrong, you will receive a strike.

_{*There is also the possibility that the 3×3 display could be empty when the module activates. This is not a bug. Proceed as you normally would.}