const int butPin = 7;     
const int ledPin = 2;     

bool buttonStateStable = HIGH;
bool lastButtonState = HIGH;  

unsigned long lastDebounceTime = 0;
const int debounceDelay = 50;   

void setup() {
  pinMode(butPin, INPUT_PULLUP) ;//h-
  pinMode(ledPin, OUTPUT);
}
void loop() {
  bool reading = digitalRead(butPin);

  if(reading != lastButtonState){
    lastDebounceTime = millis();
  }

  if((millis()- lastDebounceTime)> debounceDelay){
    
    if(reading !=buttonStateStable ){
      buttonStateStable = reading;
      if(buttonStateStable == LOW){
        digitalWrite(ledPin,!digitalRead(ledPin));
      } 
    }
  }
  lastButtonState = reading;
}