const int buttonPin = D0;
const int ledPin = D3;
int pressCount = 0;
bool ledState = false;

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  if (digitalRead(buttonPin)) {
    delay(50);
    while (digitalRead(buttonPin));
    pressCount++;
    ledState = !ledState;
    digitalWrite(ledPin, ledState);
  }
}