Artificial intelligence and thinking

Guide the robot: sequences, choices and loops

Build the instructions, predict the route and check each step. The robot must finish on the goal, not merely pass over it.

Read the lesson

Three progressive missions. A working example is loaded initially: run it, edit it, or clear it and build your own. Move and Turn refer to the robot’s facing direction, not the edges of the screen.

Three forward steps, a left turn, then two more steps. Watch the direction change.

Robot route

Tap a cell to add or remove an obstacle. Start and goal are protected. Changing the route returns execution to the beginning.

  • Robot and direction
  • Start
  • Goal
  • Obstacle
  • Route travelled
Ready: predict the result, then press Run or One step.

Written blocks0

Executed actions0

Forward moves0

Turns0

Step0

Your program

At most 40 blocks, four nesting levels and 400 execution steps. The limit protects the browser; it does not by itself prove a loop is infinite.