const int RL1 = 1;
const int RL2 = 2;
const int RL3 = 3;
const int RL4 = 4;//dichiaro i 4 rele ai quali se scattano accendono il led
const int BL1 = 8;
const int BL2 = 9;
const int BL3 = 10;
const int BL4 = 11; //dichiaro i 4 bottoni associati al led
  int state = LOW;
  int readb =0;

void setup()
{
  pinMode(RL1, OUTPUT);
  pinMode(RL2, OUTPUT);
  pinMode(RL3, OUTPUT);
  pinMode(RL4, OUTPUT);//dichiaro i pin dei rele come output

  pinMode(BL1, INPUT);
  pinMode(BL2, INPUT);
  pinMode(BL3, INPUT);
  pinMode(BL4, INPUT);//dichiaro i pin dei bottoni come input

  digitalWrite(BL1, HIGH);
  digitalWrite(BL2, HIGH);
  digitalWrite(BL3, HIGH);
  digitalWrite(BL4, HIGH);

}
void loop()

{


    long randNumber;
    randNumber = random(1, 4);
    digitalWrite (randNumber, HIGH);
    readb=randNumber+7;

   while (state == HIGH)
   {

    state == digitalRead(readb);

    }
  digitalWrite(randNumber, LOW);
}