int pot=A0;
int led1=2;
int led2=3;
int led3=4;
int led4=5;
int potdeger;

void setup() {
  pinMode(pot, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  Serial.begin(9600);
  // put your setup code here, to run once:

}

void loop() {
  potdeger=analogRead(pot);
  potdeger=map(potdeger, 0, 1023, 0, 4);
  if (potdeger==0) {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    Serial.println("ledler kapalı");
  }
  if (potdeger==1){
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    Serial.println("led1 yandı");
  }
  if (potdeger==2) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    Serial.println("led1, led2 yandı");
  }
  if (potdeger==3) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, LOW);
    Serial.println("led1, led2, led3 yandı");
  }
  if (potdeger==4) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    Serial.println("ledler yandı");
  }
  // put your main code here, to run repeatedly:

}