const int MAIN_RED = 5;
const int MAIN_YELLOW= 6;
const int MAIN_GREEN = 7;

const int PED_RED = 3;
const int PED_GREEN = 4;

const int BUTTON = 10;

void setup() {
  pinMode(MAIN_RED, OUTPUT);
  pinMode(MAIN_YELLOW, OUTPUT);
  pinMode(MAIN_GREEN, OUTPUT);
  pinMode(PED_RED, OUTPUT);
  pinMode(PED_GREEN, OUTPUT);

  pinMode(BUTTON, INPUT);

  digitalWrite(MAIN_GREEN, HIGH);
  digitalWrite(PED_RED, HIGH);
}

void loop() {
  if(digitalRead(BUTTON) == LOW) {
    delay(10);
    return;
  }

  //MAIN
  //green, blinking
  for(int i = 0; i < 4; i++) {
    digitalWrite(MAIN_GREEN, LOW);
    delay(500);
    digitalWrite(MAIN_GREEN, HIGH);
    delay(500);
  }
  digitalWrite(MAIN_GREEN, LOW);

  //yellow
  digitalWrite(MAIN_YELLOW, HIGH);
  delay(2000);
  digitalWrite(MAIN_YELLOW, LOW);

  //red (,yellow)
  digitalWrite(MAIN_RED, HIGH);
  delay(2000);

  //PEDESTRIAN
  digitalWrite(PED_RED, LOW);
  digitalWrite(PED_GREEN, HIGH);
  delay(5000);
  for(int i = 0; i < 4; i++) {
    digitalWrite(PED_GREEN, LOW);
    delay(500);
    digitalWrite(PED_GREEN, HIGH);
    delay(500);
  }
  digitalWrite(PED_GREEN, LOW);
  digitalWrite(PED_RED, HIGH);
  delay(2000);

  //MAIN
  digitalWrite(MAIN_YELLOW, HIGH);
  delay(2000);
  digitalWrite(MAIN_RED, LOW);
  digitalWrite(MAIN_YELLOW, LOW);
  digitalWrite(MAIN_GREEN, HIGH);
}