void setup() {
  // put your setup code here, to run once:
  DDRD = 0b11111111;
  PORTD = 0b00000100;
}

void loop() {
  // put your main code here, to run repeatedly:
  bool but = PIND & 0b00000100;
  if(but = 0){
    PORTD |= 0b10000100;
  }
  else {
    PORTD &= 0b11111111;
  }
}