#define BLINK_TIME 500
int led1 = 8;
int blinkLed = 11;
bool ledState = 0;
const int buttonPin = 2;
const unsigned long debounceDelay = 50; // Adjust as needed

unsigned long lastDebounceTime = 0;
bool buttonState = HIGH; // Current debounced state
bool lastButtonState = HIGH; // Previous raw state

// Non-blocking function to detect a single click with debounce
bool isSingleClickedNonBlocking() {
  bool reading = digitalRead(buttonPin);
  unsigned long currentTime = millis();
  static bool lastDebouncedState = HIGH; // Remember the debounced state

  // Check if the raw button state has changed and the debounce time has passed
  if (reading != lastButtonState) {
    lastDebounceTime = currentTime;
  }

  if ((currentTime - lastDebounceTime) > debounceDelay) {
    // Update the debounced state
    if (reading != lastDebouncedState) {
      lastDebouncedState = reading;
      Serial.print("Button State: ");Serial.println(reading);
      // Return true only on the falling edge (button press with pull-up)
      if (lastDebouncedState == LOW) {
        lastButtonState = reading; // Update last raw state immediately after debounce
        return true;
      }
    }
  }

  // Update the last raw state for the next call
  lastButtonState = reading;
  return false; // No single click detected in this call
}

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

unsigned long tNow;
bool blinkLedState=0;
void loop() {
  if (isSingleClickedNonBlocking()) {
    //Serial.println("Single Click Detected (Non-Blocking)!");
    // Perform your single click action here
    ledState = !ledState;
    digitalWrite(led1,ledState);
  }
  if(millis()-tNow >= BLINK_TIME){
    tNow = millis();
    blinkLedState = !blinkLedState;
    digitalWrite(blinkLed,blinkLedState);
  }
  // Your other non-blocking loop code here
  // No blocking delays here!
}