1. Sequence
Computers follow instructions in order. Change the order and you change the result.

Learn coding ideas by giving Jace simple commands. No open console and no pasted code — just missions, loops, turns and friendly debugging.
Computers follow instructions in order. Change the order and you change the result.
REPEAT ×2 reuses the previous command. That is the beginning of a loop.
If your program hits a wall or misses the goal, edit the instructions and try again. That is debugging.