// North-South
#define NS_RED     D12
#define NS_YELLOW  D10
#define NS_GREEN   D9

// East-West
#define EW_RED     D5
#define EW_YELLOW  D4
#define EW_GREEN   D3

void setup() {
  pinMode(NS_RED, OUTPUT);
  pinMode(NS_YELLOW, OUTPUT);
  pinMode(NS_GREEN, OUTPUT);

  pinMode(EW_RED, OUTPUT);
  pinMode(EW_YELLOW, OUTPUT);
  pinMode(EW_GREEN, OUTPUT);
}

void loop() {
  // 1. North-South GREEN | East-West RED
  digitalWrite(NS_GREEN, HIGH);
  digitalWrite(NS_YELLOW, LOW);
  digitalWrite(NS_RED, LOW);

  digitalWrite(EW_RED, HIGH);
  digitalWrite(EW_YELLOW, LOW);
  digitalWrite(EW_GREEN, LOW);

  delay(5000);

  // 2. North-South YELLOW
  digitalWrite(NS_GREEN, LOW);
  digitalWrite(NS_YELLOW, HIGH);
  delay(2000); 

  // 3. North-South RED | East-West GREEN
  digitalWrite(NS_YELLOW, LOW);
  digitalWrite(NS_RED, HIGH);

  digitalWrite(EW_RED, LOW);
  digitalWrite(EW_GREEN, HIGH);

  delay(5000); 

  // 4. East-West YELLOW
  digitalWrite(EW_GREEN, LOW);
  digitalWrite(EW_YELLOW, HIGH);
  delay(2000); 

  // Reset to RED before next cycle
  digitalWrite(EW_YELLOW, LOW);
  digitalWrite(EW_RED, HIGH);
  // digitalWrite(EW_GREEN, LOW);
}