const int pinoBomba = 13;
const int pinoSensorMin = 6;
const int pinoSensorMax = 7;

void setup() {
  pinMode(pinoBomba, OUTPUT);
  pinMode(pinoSensorMin, INPUT);
  pinMode(pinoSensorMax, INPUT);
}

void loop() {
  // ENTRADA
  int sinalBomba = digitalRead(pinoBomba);
  int sinalSensorMin = digitalRead(pinoSensorMin);
  int sinalSensorMax = digitalRead(pinoSensorMax);

  // PROCESSAMENTO
  sinalBomba = (not sinalSensorMin or sinalBomba)
            and not sinalSensorMax;

  // SAÍDA
  digitalWrite(pinoBomba, sinalBomba);
}