local robot = require ("robot")

wall = 1
step = 0

function robot.step()
  repeat
    if step < wall then
      robot.forward()
      step = step+1
      os.sleep(2)
    end
  until step == wall
  print("Length reached, turning right")
  robot.turnRight()
  step = 0
  repeat
    if step < wall then
      robot.forward()
      step = step + 1
      os.sleep(2)
    end
  until step == wall
  robot.turnRight()
  wall = wall+1
end

repeat
 robot.step()
until false