int buttonPin = A0;             // here I define the the pin which will become the information about the button state 
int ledPin =  A1;               // here I define the pin which will give the information to the LED


int buttState = 0;              // this variable should become the information about the button status


void setup() {                  // void setup is the main program which runs only once each time you start the program or press the reset button 
 
  pinMode(ledPin, OUTPUT);       // here I tell the MCU that the LED pin will have to give some output

  pinMode(buttonPin, INPUT);      // here I tell Arduino IDE  that the button will give some input
}

void loop() {                     // void loop I need for continueous repating of the commands contained
  
  
  buttonState = digitalRead(buttonPin);   // read the the button(pin) tate and save it into variable "buttState"

                                             
                                             
  if (buttonState == HIGH) {              // check if the button is pressed (level = high = 5V)
   
    digitalWrite(ledPin, HIGH);           // if button is pressed turn LED on (5V)
  } else {
    
    digitalWrite(ledPin, LOW);            // else if the button state is not pressed, turn LED off (0 V)
  }
}