int Pin1 =2;
int Pin2 =4;
int Pin3 =8;
int Pin4 =12;
int Pn =1500;
int Fi =1000;





void setup() {
  // put your setup code here, to run once:
pinMode(Pin1, OUTPUT);
pinMode(Pin2, OUTPUT);
pinMode(Pin3, OUTPUT);
pinMode(Pin4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, LOW);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, HIGH);
digitalWrite(Pin4, HIGH);
delay(Pn);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
digitalWrite(Pin4, HIGH);
delay(Fi);
}