#define LED 6 //deklarasi konstanta LED = 6
#define PB 2 //deklarasi konstanta PB = 2

int stat_PB=1; //deklarasi variabel untuk status PB

void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);//set pin LED sbg output
  pinMode(PB, INPUT); //set pin PB sbg input
}

void loop() {
  // put your main code here, to run repeatedly:
  stat_PB= digitalRead(PB); //baca status PB
  if (stat_PB==0) {         //jika PB ditekan PB=0;
    digitalWrite(LED, HIGH);//tulis '1' ke pin LED
    delay(300);             //delay 300 mS
    digitalWrite(LED, LOW); //tulis '0' ke pin LED
    delay(300);             //delay 300 mS
  }
}