How it works
Ravi's steps were blue block, yellow block, green block.
Bo did the very same steps twice, and the two towers were twins.
The same steps from the same place give the same result, every time. Different steps can give something new.
Worked examples
Twin towers
- Bo follows blue, yellow, green.
- Ravi says again, and Bo follows the very same steps.
- A second tower stands beside the first, and they look just the same.
New steps
- Ravi says green first, then blue, then yellow.
- Bo does just what he is told.
- The new tower has a green block at the bottom, and the first two had blue at the bottom.
The same walk
- Bo runs these steps on the board: forward three times, turn left, forward.
- He lands on the star.
- Run the same steps again from the same start, and Bo lands on the star again.