#define POWER 1

task main()

{

     SetSensorType ( SENSOR_1 , SENSOR_TYPE_LIGHT );

     SetSensorType ( SENSOR_3 , SENSOR_TYPE_LIGHT );

     int start_1 = SENSOR_1 ;

     while (1)

    {

         Off ( OUT_A + OUT_C );

         if ( SENSOR_1 >start_1)

        {

             SetPower ( OUT_A , 1 * POWER);

             SetPower ( OUT_C , 0);

             OnFwd ( OUT_A );

        }

         else

        {

             SetPower ( OUT_A , 1 * POWER);

             SetPower ( OUT_C , 2 * POWER);

             OnFwd ( OUT_A + OUT_C );

        }

    }

}