See the attached documentation to launch the server (callable by http)
The behaviour of the drawing is the following :
- If the machine is in a white square, turn left (90°) clockwise and move forward 1 cel
- If the machine is in a black square, turn right(90°) and move forward 1 cell;
- At every move flip the color of the base square.
Program at step 137 :
Program at step 20000001 :