#define LED_B 19
#define LED_M 18
#define LED_K 5
#define PB 15

void setup() 
{
  pinMode(LED_B, OUTPUT);
  pinMode(LED_M, OUTPUT);
  pinMode(LED_K, OUTPUT);
  pinMode(PB, INPUT);
  digitalWrite(LED_B, LOW);
  digitalWrite(LED_M, LOW);
  digitalWrite(LED_K, LOW);
}

void loop() 
{
  if(digitalRead(PB) == HIGH)
  {
 
    digitalWrite(LED_B, LOW);
    digitalWrite(LED_M, LOW);
    digitalWrite(LED_K, HIGH);
    delay(3000);
    digitalWrite(LED_B, LOW);
    digitalWrite(LED_M, HIGH);
    digitalWrite(LED_K, LOW);
    delay(5000);
    digitalWrite(LED_B, LOW);
    digitalWrite(LED_M, LOW);
    digitalWrite(LED_K, HIGH);
    delay(2000);
    digitalWrite(LED_B, HIGH);
    digitalWrite(LED_M, LOW);
    digitalWrite(LED_K, LOW);
    delay(3000);
  
  }
else{
    digitalWrite(19, LOW);
    digitalWrite(18, LOW);
    digitalWrite(5, LOW);
}
 
}