void   setup() {
  // put your setup code here, to run once:
for (int x=2;x<14;x ++) {
 pinMode (x , INPUT );//memfungsikan pin 2 hingga 13 sebagai OUTPUT 
 digitalWrite (x,LOW ); //mematikan semua lampu 
}
//menghidupkan lampu merah jalan Utara, Barat,selatan ,Timur 
digitalWrite (4, HIGH );
digitalWrite (7,HIGH );
digitalWrite (10,HIGH );
digitalWrite (11,HIGH );
delay (2000);
}

void loop() {
  // put your main code here, to run repeatedly:
 Jalan_Utara ();
delay (1000) ;
Jalan_Barat ();
delay (1000);
Jalan_Selatan();
delay (1000);
Jalan_Timur ();
delay (1000);
}

void Jalan_Utara(){
  digitalWrite (4,LOW );
  digitalWrite (2,HIGH );
  delay (5000);
  digitalWrite (2,LOW );
  digitalWrite (3,HIGH );
  delay (2000);
  digitalWrite (3,LOW );
  digitalWrite (4,HIGH );

}

void Jalan_Barat(){
  digitalWrite (7,LOW );
  digitalWrite (5,HIGH );
  delay (5000);
  digitalWrite (5,LOW );
  digitalWrite (6,HIGH );
  delay (2000);
  digitalWrite (6,LOW );
  digitalWrite (7,HIGH );
}
void Jalan_Selatan(){
  digitalWrite  (10,LOW );
  digitalWrite (8,HIGH );
  delay (5000);
  digitalWrite (8,LOW );
  digitalWrite (9,HIGH );
  delay (2000);
  digitalWrite (9,LOW );
  digitalWrite (10,HIGH );
}
void Jalan_Timur(){
  digitalWrite (11,LOW );
  digitalWrite (13, HIGH );
  delay (5000);
  digitalWrite (13, LOW );
 digitalWrite (12,HIGH ) ;
 delay (2000);
 digitalWrite (12,LOW );
 digitalWrite (11,HIGH );
}