int AvgLevel1, AvgLevel3;
int Diff1, Diff3;

task main ()
{
  int min1=100, min3=100;
  int max1=0, max3=0;
  int a;

  SetSensor (SENSOR_1, SENSOR_LIGHT);
  SetSensor (SENSOR_3, SENSOR_LIGHT);

  OnFwd (OUT_A+OUT_C);
  ClearTimer (1);
  while (Timer (1)<10)
  {
    a = SENSOR_1;
    if(a < min1) min1 = a;
    if(a > max1) max1 = a;
    a = SENSOR_3;
    if(a < min3) min3 = a;
    if(a > max3) max3 = a;
  }
  Off (OUT_A+OUT_C);
  AvgLevel1 = (max1 + min1) / 2;
  Diff1 = max1 - min1;
  AvgLevel3 = (max3 + min3) / 2;
  Diff3 = max3 - min3;
}