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);
digitalWrite(4, HIGH);
digitalWrite(7, HIGH);
digitalWrite(10, HIGH);
}

void loop() {
  // put your main code here , to run repeatedly:
  jalan_satu();
  jalan_dua();
  jalan_tiga();
}

void jalan_satu(){
  digitalWrite(4, LOW);
  digitalWrite(3, HIGH);
  delay(500);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  delay(2000);
  digitalWrite(2, LOW);
  digitalWrite(4, HIGH);
}

void jalan_dua(){
  digitalWrite(7, LOW);
  digitalWrite(6, HIGH);
  delay(500);
  digitalWrite(6, LOW);
  digitalWrite(5, HIGH);
  delay(2000);
  digitalWrite(5, LOW);
  digitalWrite(7, HIGH);
}

void jalan_tiga(){
digitalWrite(10, LOW);
digitalWrite(9, HIGH);
delay(500);
digitalWrite(9, LOW);
digitalWrite(8, HIGH);
delay(2000);
digitalWrite(8, LOW);
digitalWrite(10, HIGH);
}