1. First, pick three numbers. How about 2, 3, and 4?
2. Pick a point on the grid to start.
3. Start drawing lines in a spiral (first to the right, then up, then to the left, then down). Make your first line 2 squares long, next 3 squares long, next 4 squares long, and then go back to 2 squares long for the down stroke.
4. Keep drawing around and around until you get back to the start! You've made a 2-3-4 loop-de-loop!
5. What would a 2-1-4 loop-de-loop look like?
6. What about a 3-5-2 loop? (Don't worry if some of your lines overlap.)
7. What do you think would happen if you switched a 2-1-4 loop to a 4-1-2?
8. What does a 5-4-3-2 loop look like? (Do you think it's coming back?)
9. What about a 1-2-3-4-5 loop?
10. Make some loopy experiments of your own. Enter a comma-separated list of lengths for your loop.