int memory = 0;
int led_state = 0;

void setup() {
DDRB = 0;
DDRD = 4;
Serial.begin(9600);
Serial.println("NYOMOGOMB TESZT");
}

void loop() {
 if (PINB == 1 && memory == 0) {
   PORTD = 0;
   memory = 1;
   led_state = !led_state;
   Serial.println("LENYOMVA");
  }
 if (PINB == 0 && memory == 1) {
   memory = 0;
   Serial.println("ELENGEDVE");
  }
 if (led_state == 1) {
  PORTD = 4;
 }
 else {
  PORTD = 0;
 }
 
 delay(10);
}