const int buttonPin = 7;
int lastState = HIGH;

void setup() {
  Serial.begin(9600);
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  int state = digitalRead(buttonPin);

  if (state == LOW && lastState == HIGH) {
    Serial.println("PRESS");
    delay(200);
  }

  lastState = state;
}