int sayi;
void setup() {
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  
}
void loop(){
  digitalWrite(2,1);
  digitalWrite(3,0);
  digitalWrite(4,0);
  delay(5000);
  digitalWrite(2,0);
  digitalWrite(3,1);
  digitalWrite(4,0);
  delay(2000);
  digitalWrite(2,0);
  digitalWrite(3,0);
  digitalWrite(4,1);
  delay(5000);
  
  

}