/* 
 Button

 Turns ON and OFF a LED connected to digital pin 8, when pressing a pushbutton attached to pin 7.

 The circuit: LED attached from pin 8 to ground, pushbutton attached to pin 7 from +5V, 10K resistor attached to pin 4 from ground

  created 2005 by DojoDave <http://www.0j0.org>
  modified 30 Aug 2011 by Tom Igoe
  modified 20 March 2018 by Kati Pitkänen

  This example code is in the public domain.
  http://www.arduino.cc/en/Tutorial/Button
*/

// Setting pin numbers:
const int pinButton = 7;                    // The number of the pushbutton pin
const int pinLED =  8;                      // The number of the LED pin

// Variables will change:
const int stateButton = 0;                  // Variable for reading the pushbutton status


void setup() { 
  pinMode(pinButton, INPUT);                // Set the pushbutton pin as an INPUT
  pinMode(pinLED, OUTPUT);                  // Set the LED pin as an OUTPUT
}

void loop() {

  int stateButton = digitalRead(pinButton); // Read the state of the button

  // check if the button is pressed
  // if it is, the buttonState is 0: [because the button has a PULL-UP resistor]
  
  if (stateButton == LOW) {
    // turn LED on:
    digitalWrite(pinLED, HIGH);             // Write 1 or HIGH to LED pin
  }
  else {
    // turn LED off:
    digitalWrite(pinLED, LOW);              // Write 0 or low to LED pin
  }
}