by Doug Zongker, Nina Hinrichs
Answers: INHABIT, DAWN, ROFFE
This puzzle requires reassembling of a Logo turtle-graphics program that has been cut up into 14 pieces. The strip with the straight top edge is the start of the program; the strip with the straight bottom edge is the end. The remaining 12 strips can be placed in between them by obeying the constraints suggested in the opening paragraph:
- The turtle never goes more than 10 steps north or south of its starting location.
- The program is "efficient", which means:
- There are never two consecutive turns ("lt 60 rt 120"), nor two consecutive movements in the same direction ("fd 10 fd 20").
- Consecutive movements in different directions ("fd 10 bk 20") are only legal if the pen is down.
- There's never a "pu" if the pen is already up, or a "pd" if the pen is already down.
The turtle heads with different-colored masks represent changing the color of the drawing pen (the commands for which vary between Logo interpreters).
If the strips are labeled A-N in their original order in the puzzle, the correct order is B-J-M-K-I-A-L-D-H-G-F-C-N-E.
Successfully reassembling and executing the program will result in this image:
Splitting that image into red, green, and blue color channels will reveal the three answers: ROFFE, INHABIT, and DAWN.