// Mozah
//PB2 is LED pin
//PA3 is button

#include <avr/io.h>
int main (void)
{
  DDRB |= (1 << PB2); //Setting PB2 as output (LED)

  DDRA &= ~(1 << PA3);  // setting PA3 as input (Button)

  PORTA |= (1 << PA3); // Activate Pull-up resistor at PA3

 while(1) {

if (PINA &(1<< PA3)) {                  //if button pressed
  PORTB &= ~(1 << PB2);            // set PB2 high = switch on LED
}

else
{  

  PORTB |= (1 << PB2);               // set PB2 high = switch off LED
}

        }
}