void setup() {
  // put your setup code here, to run once:
//lampu lalu lintas 1
pinMode(1, OUTPUT);//MERAH
pinMode(2, OUTPUT);//KUNING
pinMode(3, OUTPUT);//HIJAU
//lampu lalu lintas 2
pinMode(4, OUTPUT);//MERAH
pinMode(5, OUTPUT);//KUNING
pinMode(6, OUTPUT);//HIAJU
//lampu lalu lintas 3
pinMode(7, OUTPUT);//MERAH
pinMode(8, OUTPUT);//KUNING
pinMode(9, OUTPUT);//HIJAU
//lampu lalu lintas 4  
pinMode(10, OUTPUT);//MERAH
pinMode(11, OUTPUT);//KUNING
pinMode(12, OUTPUT);//HIJAU
}

void loop() {
  // put your main code here, to run repeatedly:
//lampu lalulintas 1
digitalWrite(1,LOW);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
//lampu lalulintas 2
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, HIGH);
digitalWrite(8,LOW);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
delay(2000);

//lampu lalu lintas 1
digitalWrite(1, LOW);
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, LOW);
digitalWrite(5, HIGH);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
delay(1000);

//lampu lalu lintas 1
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
//lampu lalu lintas 3
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
delay(2000);

//lampu lalu lintas 1
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, LOW);
digitalWrite(5, HIGH);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
delay(1000);

//lampu lalu lintas 1
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, HIGH);
//lampu lalu lintas 4
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
delay(2000);

//lampu lalu lintas 1
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
digitalWrite(12, LOW);
delay(1000);

//lampu lalu lintas 1
digitalWrite(1, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, HIGH);
delay(2000);

//lampu lalu lintas 1
digitalWrite(1, LOW);
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
//lampu lalu lintas 2
digitalWrite(4, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
//lampu lalu lintas 3
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
//lampu lalu lintas 4
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
digitalWrite(12, LOW);
delay(1000);

}