int cars = 0;

void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  Serial.begin(9600);

}

void loop() {
    if (analogRead(A1) >= 100) {
      cars = cars + 1;
      delay(100);
      if (cars > 6) {
        cars = 7;
        analogWrite(2,255);
        analogWrite(3,0);
        analogWrite(4,0);
      }
    }
    if (analogRead(A2) >= 100) {
      cars = cars - 1;
      delay(100);
      if (cars < 0) {
        cars = 0;

      }
      if (cars < 6) {
        analogWrite(2,0);
        analogWrite(3,255);
       analogWrite(4,0);
      }     
        }
    Serial.println((String("cars ") + String(cars) + String(" infro ") + String(analogRead(A1)) + String(" infro2 ") + String(analogRead(A2))));
    delay(200);
}