Tying Random Function to LEDs that light up

Projects Programming
1

Hello,

I am trying to make a game that checks a reaction speed. The point is that if a random LED lights up, the person needs to press corresponding button in a specified time frame. I have tried to use Random function, the code works, but the problem is that this Random value does not correlate with the LED that lights up; for example, there are three LED lights, if the second one lights up, a Random Value should be 1, but in my case, it is equal to arbitrary number, and I wasn't able to notice any pattern in there.
I am a newbie in Arduino coding, so the code could be a bit messy.

#include "pitches.h"

int led = 9;
int minPin = 9;
int maxPin = 11;
int speaker = 7;

int contButton[] = {3, 5, 6};
int mills = 0;

int score = 0;
int ledNumber = 0;

int melody[] = {NOTE_D5, NOTE_D5, NOTE_G4, NOTE_A4, NOTE_D5, NOTE_B4, NOTE_B3, NOTE_A4};
// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {4, 8, 8, 4, 4, 4, 4, 4};

void setup() {
  Serial.begin(9600);
  randomSeed(analogRead(0));

  for (int i = minPin; i <= maxPin; i++) {
    pinMode(i, OUTPUT);
  }

  pinMode(contButton[0], INPUT);
  pinMode(contButton[1], INPUT);
  pinMode(contButton[2], INPUT);

  int noteDuration = 1000 / 16;
  tone(speaker, NOTE_A7, noteDuration);
  delay(noteDuration * 1.3);
  noTone(speaker);

  ledNumber = random(3);
  digitalWrite(led + ledNumber, HIGH);
}

void loop() {
  int whileCheck = 0; 

  mills = millis();
  while (millis() < mills + 5000) {
    Serial.println(ledNumber);

    if (digitalRead(contButton[ledNumber]) == HIGH) {
      cont();
      digitalWrite(led + ledNumber, HIGH);
      whileCheck = 1;
      break;
    }
  }

  if (whileCheck != 1) {
    lossV2();
    digitalWrite(led + ledNumber, HIGH);
    whileCheck = 0;
  }
  delay(10);

  ledNumber = random(3);
  led = 9;
}

void cont() {
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, HIGH);
  }
  delay(700);
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, LOW);
  }
  led = 9;
}

void lossV2() {
  led = minPin - 1;
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, LOW);
  }

  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(led, LOW);
    led++;
    digitalWrite(led, HIGH);
    delay(50);
  }

  led = maxPin + 1;
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(led, LOW);
    led = led - 1;
    digitalWrite(led, HIGH);
    delay(50);
  }

  delay(100);

  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, LOW);
  }
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, HIGH);
  }
  delay(750);
  for (int i = minPin; i <= maxPin; i++) {
    digitalWrite(i, LOW);
  }
  led = 9;
}

void music() {
  // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 8; thisNote++) {
    // to calculate the note duration, take one second divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(speaker, melody[thisNote], noteDuration);

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(speaker);
  }
}

I would really appreciate your help!