BEGINNING-OF-PROGRAM

    define-new-instruction turnright as
    begin
      turnleft;
      turnleft;
      turnleft
    end;

    define-new-instruction step as
    begin
      turnleft;
      move;
      turnright;
      move
    end;

  BEGINNING-OF-EXECUTION

    step;
    step;
    step;
    step;
    step;
    
    turnoff

  END-OF-EXECUTION

END-OF-PROGRAM