#define YELLOW_LED 3
#define RED_LED 4
#define GREEN_LED 5
#define BUTTON_PIN 2
#define BUZZER 6

bool ped_request = false;

void setup() {
  // put your setup code here, to run once:
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(BUZZER, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(BUTTON_PIN, LOW);
  int button_state = digitalRead(BUTTON_PIN);
  Serial.println(button_state);
  
  if(button_state==1){
    ped_request = true;
  }
  

  digitalWrite(GREEN_LED, HIGH);
  delay(5000);
  digitalWrite(GREEN_LED, LOW);

  if(ped_request==true){
    ped_routine();
    ped_request=false;
    return;
  }

  digitalWrite(YELLOW_LED, HIGH);
  delay(2000);
  digitalWrite(YELLOW_LED, LOW);

  digitalWrite(RED_LED, HIGH);
  delay(5000);
  digitalWrite(RED_LED, LOW);


}

void ped_routine(){
  tone(6, 262, 250); // Plays 262Hz tone for 0.250 seconds
  for(int8_t i=1;i<=5;i++){
    digitalWrite(BUZZER,HIGH);
    digitalWrite(RED_LED, HIGH);
    delay(1000);
    digitalWrite(RED_LED, LOW);
    delay(1000);
  }
  digitalWrite(BUTTON_PIN, LOW);
  digitalWrite(BUZZER, LOW);
}