void setup() {
  // put your setup code here, to run once:
pinMode(13, HIGH);
pinMode(12, HIGH);
pinMode(8, HIGH);

}

void loop() {

if (digitalRead(4 == LOW))

{

digitalWrite(13, HIGH);
delay (2000);
digitalWrite(13, LOW);


digitalWrite(12, HIGH);
delay (1000);
digitalWrite(12, LOW);


digitalWrite(8, HIGH);
delay(2000);
digitalWrite(8, LOW);

}

else 

{
digitalWrite(12, HIGH);
delay (1000);
digitalWrite (12, LOW);
delay (1000);

}


}