int u = 8;
int h = 7;
int b = 6;

int k = 5;

int pbk = 3;

int pbstdk = 0;


void setup() {
  // put your setup code here, to run once:
pinMode(u, OUTPUT);
pinMode(h, OUTPUT);
pinMode(b, OUTPUT);
pinMode(k, OUTPUT);

pinMode(pbk, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

digitalWrite(b, HIGH);

digitalWrite(u, HIGH);
delay(250);
digitalWrite(u, LOW);
delay(250);
digitalWrite(h, HIGH);
delay(250);
digitalWrite(h, LOW);

pbstdk = digitalRead(pbk);

if (pbstdk == HIGH){
  digitalWrite(k, HIGH);
}
  else
  digitalWrite(k, LOW);
}