#define led_merah 13
#define led_hijau 12
#define tombol_1  A0
#define tombol_2  A1

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led_merah,OUTPUT);
  pinMode(led_hijau,OUTPUT);
  pinMode(tombol_1,INPUT_PULLUP);
  pinMode(tombol_2,INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(tombol_1)==LOW) {
    for(int i=0;i<20;i++) {
      digitalWrite(led_merah,HIGH); delay(300);
      digitalWrite(led_merah,LOW); delay(300);
      Serial.print("Ulang : "); Serial.println(i);
    }
  }
  else if(digitalRead(tombol_2)==LOW){
    digitalWrite(led_merah,LOW); 
  } 
}