int move_time, turn_time, total_time;

task main()
{
  total_time = 0;
  do
  {
    move_time = Random(100);
    turn_time = Random(100);
    OnFwd(OUT_A+OUT_C);
    Wait(move_time);
    OnRev(OUT_C);
    Wait(turn_time);
    total_time += move_time; total_time += turn_time;
  }
  while (total_time < 2000);
  Off(OUT_A+OUT_C);
}