int randLED=random(8, 13);
void setup() {
  pinMode(8, OUTPUT); 
  pinMode(9, OUTPUT); 
  pinMode(10, OUTPUT); 
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
}

void loop() {
  digitalWrite(randLED, HIGH);
  if(digitalRead(3) == HIGH && randLED == 8){
    digitalWrite(randLED, LOW);
    randLED = random(8, 13);
  }
  if(digitalRead(4) == HIGH && randLED == 9){
    digitalWrite(randLED, LOW);
    randLED = random(8, 13);
  }
  if(digitalRead(5) == HIGH && randLED == 10){
    digitalWrite(randLED, LOW);
    randLED = random(8, 13);
  }
  if(digitalRead(6) == HIGH && randLED == 11){
    digitalWrite(randLED, LOW);
    randLED = random(8, 13);
  }
  if(digitalRead(2) == HIGH && randLED == 12){
    digitalWrite(randLED, LOW);
    randLED = random(8, 13);
  }


}