const int ledPin = 11;
const int btnBrightUp = 4;
const int btnBrightDown = 5;
const int btnSpeedUp = 6;
const int btnSpeedDown = 7;
int brightness = 128; // Яркость (0-255)
int blinkDelay = 500; // Задержка мигания в мс
unsigned long lastBlinkTime = 0;
bool ledState = false;


void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(btnBrightUp, INPUT_PULLUP);
  pinMode(btnBrightDown, INPUT_PULLUP);
  pinMode(btnSpeedUp, INPUT_PULLUP);
  pinMode(btnSpeedDown, INPUT_PULLUP);
}
void loop() 
{
  if (digitalRead(btnBrightUp) == LOW) 
  {
    brightness = constrain(brightness + 5, 0, 255);
    delay(50);
  }
  if (digitalRead(btnBrightDown) == LOW) 
  {
    brightness = constrain(brightness - 5, 0, 255);
    delay(50);
  }
  if (digitalRead(btnSpeedUp) == LOW) 
  {
    blinkDelay = constrain(blinkDelay - 20, 50, 2000);
    delay(50);
  }
  if (digitalRead(btnSpeedDown) == LOW) 
  {
    blinkDelay = constrain(blinkDelay + 20, 50, 2000);
    delay(50);
  }
  if (millis() - lastBlinkTime >= blinkDelay) 
  {
    lastBlinkTime = millis();
    ledState = !ledState;
    if (ledState) 
    {
      analogWrite(ledPin, brightness);
    } 
    else 
    {
      analogWrite(ledPin, 0);
    }
  }
}