void setup() {
  pinMode(15, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);

  pinMode(27, INPUT_PULLUP); //PB OFF
}
void loop() {
  if(digitalRead(27)==LOW){digitalWrite(15, HIGH); digitalWrite(2, HIGH);
  digitalWrite(4, HIGH); digitalWrite(5, HIGH);}
   if(digitalRead(27)==HIGH){digitalWrite(15, LOW); digitalWrite(2, LOW);
  digitalWrite(4, LOW); digitalWrite(5, LOW);}
}