int led1=2;
int led2=3;
int led3=4;
int servis=5;

void setup() {
  // put your setup code here, to run once:
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 pinMode(servis, INPUT_PULLUP);
 digitalWrite(led1,LOW);
 digitalWrite(led2,LOW);
 digitalWrite(led3,LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
 if(digitalRead(servis)==HIGH)
 {
 digitalWrite(led1,HIGH);
  delay(2000);
 digitalWrite(led2,HIGH);
 delay(1000);
  digitalWrite(led1,LOW);
 digitalWrite(led2,LOW);
digitalWrite(led3,HIGH);
delay(3000);
digitalWrite(led3,LOW);
digitalWrite(led2,HIGH);
delay(1000);
digitalWrite(led2,LOW);
 }
 else{
digitalWrite(led1,HIGH);
 digitalWrite(led2,HIGH);
 digitalWrite(led3,HIGH);
 delay(500);
 digitalWrite(led1,LOW);
 digitalWrite(led2,LOW);
 digitalWrite(led3,LOW);
 delay(500);
 }
}