//i assume your vehicle is a roverbot (see pg 10 of constructopedia)
// turn off master when downloading this program to the slave
// Based on message received from master, it will execute backward, forward or turn right

task main()
{
   while (true)
   {
      ClearMessage();
      until (Message() !=0);
      if (Message() ==1)
      {
         OnRev(OUT_A+OUT_C);   //if message 1 received, go back
      }
      if (Message() ==2)
      {
         OnFwd(OUT_A+OUT_C);   //if 2, go forward
      }
      if (Message() ==3)
      {
          OnFwd(OUT_A);
          OnRev(OUT_C);        //if 3, turn right
      }
   }
}