//Simple line follow for RCX, slow, turn to right tlg 7/22/02
#define THRESHOLD 760

void main()
{
    while(digital(1)==0){ // check sensor levels first
        printf("%d", light(2));
        sleep(.3);
    }
    while(digital(1)==1); //wait here to release switch
    printf("BL-fs"); // basic line follow - slow, place bot to right of line
    motor(A,30); motor(C,30);
    while (digital(1)==0)
      {
        if (light(2) < THRESHOLD)
          {
            motor(C,-30);off(A);
            while (light(2) < THRESHOLD); //wait until >=
        }
        motor(A,30); motor(C,30);
         
    }
    ao();
}