int main (void)
{
//Set the Led Pin.
  DDRA = (1 << PA7);
//While(1) allows the program to loop
  while (1)
    {
//Set the Led as "ON"
      PORTA = (1 << PA7);
//Wait for 1 second
      _delay_ms(300);

//Set the Led as "OFF"
      PORTA = (0 << PA7);
//Wait for 1 second"
      _delay_ms(200);
    }
  return 1;//keep returning 1 so that the program will loop endlessly
}