const int BUTTON_PIN = 10;

unsigned long buttonPressStartTime = 0;
bool buttonWasPressed = false;

void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP); // Assumes button connects pin to GND

  Serial.begin(9600);
  Serial.println("hi Mom!\n");

}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);
  unsigned long currentMillis = millis();

  // --- BUTTON PRESS LOGIC ---
  if (buttonState == LOW) { // Button is being pressed
    if (!buttonWasPressed) {
Serial.println("                                 mouse down,");
      buttonPressStartTime = currentMillis;
      buttonWasPressed = true;
    }
  } else { // Button is released
    if (buttonWasPressed) {
      unsigned long pressDuration = currentMillis - buttonPressStartTime;

      buttonWasPressed = false;
Serial.print("         mouse    up after ");
Serial.println(pressDuration);
    }
  }

//  delay(25);  // poor man's debounce 
}