const int btn = 15;
const int ledH = 19;
const int ledK = 18;
const int ledM = 5;

void setup() 
{
  Serial.begin(9600);
  pinMode(btn, INPUT);
  pinMode(ledH, OUTPUT);
  pinMode(ledK, OUTPUT);
  pinMode(ledM, OUTPUT);
}

void loop() 
{
  int statusBtn = digitalRead(btn);
  if(statusBtn==HIGH)
  {
    digitalWrite(ledK, HIGH);
    delay(3000);
    digitalWrite(ledK, LOW);
    digitalWrite(ledM, HIGH);
    delay(5000);
    digitalWrite(ledK, HIGH);
    delay(2000);
    digitalWrite(ledH, HIGH);
    digitalWrite(ledK, LOW);
    digitalWrite(ledM, LOW);
    delay(3000);
    digitalWrite(ledH, LOW);
  }
}