//Make your roverbot move forward for 5 sec 
//and backward for 4 sec and then stop.

task main()
{
   OnFwd(OUT_A+OUT_C);
   Wait (500);
   OnRev(OUT_A+OUT_C);
   Wait(400);
   Off(OUT_A+OUT_C);
}   

    Source: geocities.com/fuhan75