#define turn_around     OnRev(OUT_B); Wait(340);OnFwd(OUT_A+OUT_B);

task main()
{
  OnFwd(OUT_A+OUT_B);
  Wait(100);
  turn_around;
  Wait(200);
  turn_around;
  Wait(100);
  turn_around;
  Off(OUT_A+OUT_B);
}