int A_satu=2;
 int A_dua=3;
 int A_tiga=4;
 int B_satu=5;
 int B_dua=6;
 int B_tiga=7;
 int C_satu=8;
 int C_dua=9;
 int C_tiga=10;
 int D_satu=11;
 int D_dua=12;
 int D_tiga=13;
void setup() {
  pinMode(A_satu, OUTPUT);
  pinMode(A_dua, OUTPUT);
  pinMode(A_tiga, OUTPUT);
  pinMode(B_satu, OUTPUT);
  pinMode(B_dua, OUTPUT);
  pinMode(B_tiga, OUTPUT);
  pinMode(C_satu, OUTPUT);
  pinMode(C_dua, OUTPUT);
  pinMode(C_tiga, OUTPUT);
  pinMode(D_satu, OUTPUT);
  pinMode(D_dua, OUTPUT);
  pinMode(D_tiga, OUTPUT);
}
void loop() {
  digitalWrite(A_tiga, HIGH);
  digitalWrite(B_satu, HIGH);
  digitalWrite(C_tiga, HIGH);
  digitalWrite(D_satu, HIGH);
  delay(1000);
  digitalWrite(A_tiga, LOW);
  digitalWrite(B_satu, LOW);
  digitalWrite(C_tiga, LOW);
  digitalWrite(D_satu, LOW);
  delay(1000);
  digitalWrite(A_dua, HIGH);
  digitalWrite(B_dua, HIGH);
  digitalWrite(C_dua, HIGH);
  digitalWrite(D_dua, HIGH);
  delay(1000);
  digitalWrite(A_dua, LOW);
  digitalWrite(B_dua, LOW);
  digitalWrite(C_dua, LOW);
  digitalWrite(D_dua, LOW);
  delay(1000);
  //lampu 2
  digitalWrite(A_satu, HIGH);
  digitalWrite(B_tiga, HIGH);
  digitalWrite(C_satu, HIGH);
  digitalWrite(D_tiga, HIGH);
  delay(1000);
  digitalWrite(A_satu, LOW);
  digitalWrite(B_tiga, LOW);
  digitalWrite(C_satu, LOW);
  digitalWrite(D_tiga, LOW);
  delay(1000);
  digitalWrite(A_dua, HIGH);
  digitalWrite(B_dua, HIGH);
  digitalWrite(C_dua, HIGH);
  digitalWrite(D_dua, HIGH);
  delay(1000);
  digitalWrite(A_dua, LOW);
  digitalWrite(B_dua, LOW);
  digitalWrite(C_dua, LOW);
  digitalWrite(D_dua, LOW);
  delay(1000);
  
}