#define RED_PIN 2
#define GREEN_PIN 3
#define BUT_PIN 4
#define reset_PIN 5
#define PZ_PIN 6
uint32_t btnTimer = 0;
bool flag = false;
bool btnStateFlag = false;
bool resetFlag = false;
void setup() {
  Serial.begin(9600);
  pinMode(BUT_PIN, INPUT);
  pinMode(reset_PIN, INPUT);
  pinMode(PZ_PIN, OUTPUT);
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
}
void loop () {
  if (millis()-btnTimer<500)
  tone (PZ_PIN, 500);
  if (millis() - btnTimer >= 500 && millis()- btnTimer < 3500)
{
  noTone(PZ_PIN);
  bool btnState = digitalRead(BUT_PIN);
  if (btnState && !flag)
  {
  flag = true;
  btnStateFlag = true;}
}
if (millis()-btnTimer > 3500 && millis()- btnTimer <= 4500)
tone (PZ_PIN, 500);
if (millis()-btnTimer > 4500)
{
  noTone(PZ_PIN);
  if (btnStateFlag)
  {
    digitalWrite(GREEN_PIN, HIGH);
    digitalWrite(RED_PIN, LOW);
  }
  else
  {
    digitalWrite(GREEN_PIN, LOW);
    digitalWrite(RED_PIN, HIGH);
  }
  
}
bool resetState = digitalRead(reset_PIN);
if (resetState && !resetFlag)
{
  resetFlag=true;
  flag=false;
btnStateFlag=false;
digitalWrite(GREEN_PIN, LOW);
digitalWrite(RED_PIN, LOW);
btnTimer = millis();
}
if (resetState && resetFlag)
{
  resetFlag=false;
}
}