const int tombol= 3;
const int numLED = 4;
const int lampu[numLED]={8,9,10,11}; 
 
 void setup() {
 pinMode(tombol, INPUT);
for(int i=0;i<4;i++)
  pinMode(lampu[i], OUTPUT);
  
  digitalWrite(tombol, HIGH);

 }
 
 void loop () {
    if (digitalRead(tombol)==LOW)
    for(int i=0;i<4;i++){
    digitalWrite(lampu[i], HIGH);
  }
  if (digitalRead(tombol)==HIGH)
    for(int i=0;i<4;i++){
    digitalWrite(lampu[i], LOW);
  }
 }