/*
  Arduino | general-help
  Nono - January 31, 2026 2:06 PM

  I do a game of reaction
*/

const unsigned long SPEED = 150;  // lower value is faster
const int NUM_LEDS = 5;
const int LED_PINS[NUM_LEDS] = {12, 11, 10, 9, 8};
const int BTN_PIN = 7;

int count = 0;
int increment = 1;
unsigned long prevTime = 0;

void checkResult()  {
  if ((count - increment) == 2) {
    Serial.println("Winner!");
    for (int i = 0; i < 5; i++) {
      digitalWrite(LED_PINS[2], HIGH);
      delay(250);
      digitalWrite(LED_PINS[2], LOW);
      delay(250);
    }
  } else {
    Serial.println("Loser!");
    delay(2000);
  }
  count = 0;
}

void setup() {
  Serial.begin(115200);
  for (int i = 0; i < NUM_LEDS; i++)  {
    pinMode(LED_PINS[i], OUTPUT);
  }
  pinMode (BTN_PIN, INPUT_PULLUP);
}

void loop() {
  int stop = !digitalRead(BTN_PIN);
  if (stop) checkResult();

  //Serial.println(count);
  if (millis() - prevTime >= SPEED) {
    prevTime = millis();
    // turn all LEDs off
    for (int i = 0; i < NUM_LEDS; i++)  {
      digitalWrite(LED_PINS[i], LOW);
    }
    // turn next LED on
    digitalWrite(LED_PINS[count], HIGH);
    count = count + increment;
    if (count <= 0) increment = 1;
    if (count >= (NUM_LEDS - 1)) increment = -1;
  }
}