SparkFun - Traffic Light with Crossing

int button = 7;
int buttonState = 0;
int red = 3;
int yellow = 4;
int green = 5;

void setup() {

    pinMode(red, OUTPUT); // red led
    pinMode(yellow, OUTPUT); // yellow led
    pinMode(green, OUTPUT); // green led
    pinMode(button, INPUT); // button
    
}



// Main/Loop Function
void loop(){
 if (digitalRead(button) == HIGH){
        if (digitalRead(button) == HIGH) {
            // if the button pressed, stop traffic
            lightCycle();
        }
 }
    else { // If the button is off, traffic goes on
      digitalWrite(green, HIGH);
      digitalWrite(yellow, LOW);
      digitalWrite(red, LOW);
    }
 }
 

void lightCycle(){
  
  // Turns green off, Yellow on 
  delay(2000);
  digitalWrite(green, LOW);
  digitalWrite(yellow, HIGH);
  digitalWrite(red, LOW);
  delay(3000);


  // Turns yellow off, Red on
  digitalWrite(green, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(red, HIGH);
  delay(8000);
}