const int buttonPin = 27; // the number of the pushbutton pin

const int ledPin = 1;

// the number of the LED pin

bool flag = false;

bool pressed = false;

  

// variables will change:

int buttonState = 0; // variable for reading the pushbutton status

  

void setup() {

Serial.begin(9600);//initalise serial on 9600 baud rate

  

// initialize the LED pin as an output:

pinMode(ledPin, OUTPUT);

// initialize the pushbutton pin as an input:

pinMode(buttonPin, INPUT);

  

delay(1000);

Serial.println("led test");

  

}

  

void loop() {

// read the state of the pushbutton value:

buttonState = digitalRead(buttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:

if (buttonState == HIGH)

{

if (pressed == false) // introduce this boolean variable to cater teh blinking effect

{

Serial.println(buttonState);

Serial.println("button is pressed");

flag = !flag; //flag=!flag

pressed = true;

}

  
  
  

}

else{

pressed = false;

delay(50);

}

  
  

  
  

digitalWrite (ledPin, flag);

  
  
  
  

}