//8 задание
bool SOS = false;
unsigned long lastBaselineUpdate = 0;
int ph = analogRead(A0);
void setup() {
  pinMode(2, INPUT_PULLUP);
  pinMode(13, OUTPUT);
}
void loop() {
  int currentLight = analogRead(A0);
  int buttonState = digitalRead(2);
  if (millis() - 0 > 5000 && !SOS) {
    ph = (ph * 3 + currentLight) / 4;
    lastBaselineUpdate = millis();
  }
  if (abs(currentLight - ph) > 100 && !SOS) {
    SOS = true;
  }
  if (buttonState == LOW && SOS) {
    SOS = false;
    ph = currentLight;
    digitalWrite(13, LOW);
  }
  if (SOS) {
    digitalWrite(13, (millis() / 200) % 2);
  } else {
    digitalWrite(13, LOW);
  }
  delay(50);
}