light-chaser.nqc

int max_1, max_3, time_count;
task main()
{
  SetSensor(SENSOR_1,SENSOR_LIGHT);
  SetSensor(SENSOR_3,SENSOR_LIGHT);

  max_1 = 0;
  max_3 = 0;
  time_count = 0;

  OnFwd(OUT_A);
  OnRev(OUT_C);
  do
  {
    Wait(10);
    time_count = time_count + 1;
    if (SENSOR_1 > max_1)
    {
      max_1 = SENSOR_1;
    }
    if (SENSOR_3 > max_3)
    {
      max_3 = SENSOR_3;
    }
  }
  while (time_count < 50);

  until(SENSOR_1 >= (max_1-2));
  Off(OUT_A+OUT_C);

  while (true)
  {
    if (SENSOR_3 > SENSOR_1)
    {
      OnFwd(OUT_A);
      OnRev(OUT_C);
      Wait(1);
    }
    if (SENSOR_1 > SENSOR_3)
    {
      OnFwd(OUT_C);
      OnRev(OUT_A);
      Wait(1);
    }
    if (SENSOR_1 == SENSOR_3)
    {
      OnFwd(OUT_A+OUT_C);
      Wait(100);
    }
  }
}