byte tombol = 2;
  byte led= 1;
  byte led2= 3;
  byte led3= 4;
  byte led4= 5;



void setup() {
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(tombol, INPUT);
}


void loop() {
int nilai= digitalRead(tombol);

if(nilai == 1){
  digitalWrite(led, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
}
else{
  digitalWrite(led, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
}
}