int redLed = 13;
int yellowLed = 12;
int greenLed = 11;
int blueLed = 10;
int saklar = 9;
int ldrPin = A0; 

void setup() {
Serial.begin(9600);
pinMode(redLed, OUTPUT);
pinMode(yellowLed, OUTPUT);
pinMode(greenLed, OUTPUT);
pinMode(blueLed, OUTPUT);
pinMode(saklar, INPUT);
pinMode(ldrPin, INPUT);
}

void loop() {
 int datasaklar = digitalRead(saklar);
 int dataldr = analogRead(ldrPin);
  if (datasaklar == 1 && dataldr <= 300) 
  {
    digitalWrite(redLed, HIGH);
    delay(2000);
    digitalWrite(yellowLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
    digitalWrite(redLed, LOW);
    digitalWrite(yellowLed, HIGH);
    delay(2000);
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
    digitalWrite(yellowLed, LOW);
    digitalWrite(greenLed, HIGH);
    delay(2000);
    digitalWrite(redLed, LOW);
    digitalWrite(yellowLed, LOW);
    digitalWrite(blueLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, HIGH);
    delay(2000);
     digitalWrite(redLed, LOW);
    digitalWrite(yellowLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(blueLed, LOW);
    }
  else {
    if (datasaklar == 1 && dataldr > 300) {
     digitalWrite(redLed, HIGH);
     delay(500);
     digitalWrite(yellowLed, LOW);
     digitalWrite(greenLed, LOW);
     digitalWrite(blueLed, LOW);
     digitalWrite(redLed, LOW);
     digitalWrite(yellowLed, HIGH);
     delay(500);
     digitalWrite(redLed, LOW);
     digitalWrite(greenLed, LOW);
     digitalWrite(blueLed, LOW);
     digitalWrite(yellowLed, LOW);
     digitalWrite(greenLed, HIGH);
     delay(500);
     digitalWrite(redLed, LOW);
     digitalWrite(yellowLed, LOW);
     digitalWrite(blueLed, LOW);
     digitalWrite(greenLed, LOW);
     digitalWrite(blueLed, HIGH);
     delay(500);
     digitalWrite(redLed, LOW);
     digitalWrite(yellowLed, LOW);
     digitalWrite(greenLed, LOW);
     digitalWrite(blueLed, LOW);
      }
      else {
      if (datasaklar == 0 && dataldr > 300) {
       digitalWrite(redLed, HIGH);
       digitalWrite(yellowLed, HIGH);
       digitalWrite(greenLed, LOW);
       digitalWrite(blueLed, LOW);
       delay(500);
       digitalWrite(greenLed, HIGH);
       digitalWrite(blueLed, HIGH);
       digitalWrite(redLed, LOW);
       digitalWrite(yellowLed, LOW);
       delay(500);
         }
         else {
         digitalWrite(redLed, LOW);
         digitalWrite(yellowLed, HIGH);
         digitalWrite(greenLed,HIGH);
         digitalWrite(blueLed, LOW);
         delay(500);
         digitalWrite(redLed, HIGH);
         digitalWrite(yellowLed, LOW);
         digitalWrite(greenLed, LOW);
         digitalWrite(blueLed, HIGH);
         delay(500);}
    }
  }
}