void setup() {
  // put your setup code here, to run once:

pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10,OUTPUT);
pinMode(11,OUTPUT);
pinMode(12,OUTPUT);
pinMode(13,OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:

jalan_satu();
jalan_dua();
jalan_tiga();
jalan_empat();
}
void jalan_satu(){
digitalWrite(4, HIGH);
delay(2000);
digitalWrite(4, LOW);
digitalWrite(3, HIGH);
delay(1000);
digitalWrite(3, LOW);
digitalWrite(2, HIGH);
delay(2000);
digitalWrite(2, LOW);
digitalWrite(4, HIGH);

}

void jalan_dua(){
digitalWrite(7, HIGH);
delay(2000);
digitalWrite(7, LOW);
digitalWrite(5, HIGH);
delay(2000);
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
delay(2000);
digitalWrite(6, LOW);
digitalWrite(7, HIGH);

}

void jalan_tiga(){
  digitalWrite(10, HIGH);
  delay(2000);
  digitalWrite(10, LOW);
  digitalWrite(9, HIGH);
  delay(2000);
  digitalWrite(9, LOW);
  digitalWrite(8, HIGH);
  delay(2000);
  digitalWrite(8, LOW);
  digitalWrite(10, HIGH);

}

void jalan_empat(){
  digitalWrite(13, HIGH);
  delay(2000);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(2000);
  digitalWrite(11, LOW);
  digitalWrite(13, HIGH);
}