int led_merah= 12;
int led_kuning= 11;
int led_hijau = 10;

int tekan_tombol = 5;
int status_sy = 0;

void setup() {
  // setup satu kali pakai-serial
  // put your setup code here, to run once:
pinMode(tekan_tombol, INPUT);
pinMode(led_merah, OUTPUT);
pinMode(led_kuning, OUTPUT);
pinMode(led_hijau, OUTPUT);

digitalWrite(led_merah, LOW);
digitalWrite(led_kuning, LOW);
digitalWrite(led_hijau, LOW);
}

void loop() {
  // loop fungsi nya untuk memanggil berkalikali
  // put your main code here, to run repeatedly:
  if(digitalRead(tekan_tombol)){
    while(digitalRead(tekan_tombol));
    delay(1000); //1 detik
  } else if (digitalRead(tekan_tombol)) {
    digitalWrite(led_merah, HIGH);
    delay(2000);
    digitalWrite(led_merah, LOW);
    delay(2000);
    digitalWrite(led_kuning, HIGH);
    delay(2000);
    digitalWrite(led_kuning, LOW);
    delay(2000);
    digitalWrite(led_hijau, HIGH);
    delay(2000);
    digitalWrite(led_hijau, LOW);
    delay(2000);
  }
  
}