/*
program to turn robot in both clock and 
anticlockwise direction
white area reflect more light (hence higher reading)
However, action not smooth

*/

task main()
{
 while (true)
 {
 SetSensor (SENSOR_2, SENSOR_LIGHT); // light sensor attached to 2)
 OnFwd (OUT_A+OUT_C);Wait (10);
   while (true)
    {
      if (SENSOR_2 >40)             //might want to change the number 40
      {                             //depending on ambient light 
       OnRev(OUT_C);
       until (SENSOR_2 <=40);
       OnFwd (OUT_A+OUT_C); Wait (10);
      }
     else
      {
       OnRev (OUT_A);
       until (SENSOR_2 >=40);
       OnFwd (OUT_A+OUT_C);  Wait (10);
 
      }
    }
 }
 
}