//Noth
int RN=7;
int YN=6;
int GN=5;

//East
int RE=4;
int YE=3;
int GE=2;

//West
int RW=13;
int YW=12;
int GW=11;

//South
int RS=10;
int YS=9;
int GS=8;

//Delay
int r=2000;
int y=2000;
int g=2000;

void setup() {
  // put your setup code here, to run once:
  delay(1000);

  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:

  //Red (N&S) Green (E&W)
  digitalWrite(RN, HIGH);
  digitalWrite(RS, HIGH);
  digitalWrite(GE, HIGH);
  digitalWrite(GW, HIGH);
  delay(r);
  digitalWrite(RN, LOW);
  digitalWrite(RS, LOW);
  digitalWrite(GE, LOW);
  digitalWrite(GW, LOW);

  //Yellow
  digitalWrite(YN, HIGH);
  digitalWrite(YE, HIGH);
  digitalWrite(YW, HIGH);
  digitalWrite(YS, HIGH);
  delay(y);
  digitalWrite(YN, LOW);
  digitalWrite(YE, LOW);
  digitalWrite(YW, LOW);
  digitalWrite(YS, LOW);
  
  //Green (N&S) Red (E&W)
  digitalWrite(GN, HIGH);
  digitalWrite(GS, HIGH);
  digitalWrite(RE, HIGH);
  digitalWrite(RW, HIGH);
  delay(g);
  digitalWrite(GN, LOW);
  digitalWrite(GS, LOW);
  digitalWrite(RE, LOW);
  digitalWrite(RW, LOW);
  
}