byte led = 2;
byte tombol = 3;
byte baca = 0;

void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
pinMode(tombol, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
baca = digitalRead(tombol);
if (baca == 1)
  {
    digitalWrite(led,1);
  }
else 
  {
    digitalWrite(led,0);
  }
}