## On the Subject of The Moon

I’ve waited long enough now for them all to come around; and though the sun may plead and threaten, the moon will stand her ground! So say goodnight to this, the final setting of the sun; tomorrow dawns in darkness. The night-time has begun!

• The module consists of eight “outer” crescents, eight “inner” half-moons, and a center button. Buttons on the same compass point are considered to be a set.
• Four adjacent sets start out lit, four unlit. We will refer to them as “lit 1–4” and “unlit 1–4” in clockwise order.
• Find the correct button for each set by calculating a value x as directed by the left table below, then look up its modulo-7 value in the right table. lit 1 x % 7 Button D batteries AA batteries 0 outer Digits in serial 1 outer Port plates 2 outer Modules 3 inner Consonants in serial 4 inner Indicators 5 center Ports 6 center
• Determine the first set to solve by taking the sum of the serial number digits modulo 4 and using the following table.
0123
unlit 4unlit 1unlit 2unlit 3
• The next 6 sets are determined by the characters in the serial number. For each character, move to the next set as directed below: 0 1 3 5 7 8 A C E G H J L M O Q S T V X Y 2 steps clockwise 2 steps counterclockwise
If this moves you onto a solved set, continue moving a single step in the given direction until you reach an unsolved set.
• The final set is the last set that remains.
• The module will be solved once you have correctly pressed eight buttons or when you have pressed the center button.