int    LightThreshold ;
 int    Speed ;
 sub findLineSpiral() {
    int ratio = 30;
    while ((SENSOR_3 >= LightThreshold)) {
       OnFwdSync(OUT_BC, Speed, ratio);
       Wait(200);
       if ((ratio > 20)) {
          ratio -= 1;
       }
    }
 }
 

 sub findLine() {
    int __temp18 = 0;
    int tvar = __temp18;
    int lineFound = __temp18;
    int turnLeft = __temp18;
    if ((Random(2) > 0)) {
       turnLeft = 1;
    }
    long longTimeout = 10;
    long longStartTime = 0;
    while (!(lineFound)) {
       longStartTime = CurrentTick();
       tvar = 100;
       if (turnLeft) {
          tvar *= -1;
       }
       OnFwdSync(OUT_BC, Speed, tvar);
       while (( ( CurrentTick() - longStartTime )  < longTimeout) || lineFound) {
          if ((SENSOR_3 < LightThreshold)) {
             lineFound = 1;
          }
       }
       if (!(lineFound)) {
          turnLeft = !(turnLeft);
          if ((longTimeout > 1000)) {
             findLineSpiral();
             lineFound = 1;
          }
          else {
             longTimeout += 100;
          }
       }
    }
 }
 

 task main()
 {
    int __temp49 = 50;
    LightThreshold = __temp49;
    Speed = __temp49;
    SetSensorLight(IN_3);
    findLineSpiral();
    OnFwd(OUT_BC, Speed);
    while (true) {
       if ((SENSOR_3 > LightThreshold)) {
          findLine();
          OnFwd(OUT_BC, Speed);
       }
    }
 }