bool button_state, last_state = 0; 
int cnt = 13, last_cnt;

bool random_button_state, random_last_state = 0; 

void setup() {
  for(int i = 4; i < 14; i++){
    pinMode(i, OUTPUT);
  }
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  Serial.begin(9600);
  randomSeed(analogRead(0));
}

void loop() {
  button_state = digitalRead(3);
  random_button_state = digitalRead(2);
  if(button_state == 1 and last_state == 0){ 
		last_state = button_state;
    last_cnt = cnt;
    cnt--;
  }
  if(button_state == 0)last_state = button_state;
  if(cnt == 3) cnt = 13; 

  if(random_button_state == 1 and random_last_state == 0){ 
		random_last_state = random_button_state;
    last_cnt = cnt;
    cnt = random(4,14);
  }
  if(random_button_state == 0)random_last_state = random_button_state;


  Serial.println(last_cnt);
  digitalWrite(cnt, HIGH);
  if(cnt != last_cnt) digitalWrite(last_cnt, LOW);
  
}