LED_Satu_Dua

#define LED_SATU    PORTD5    // pin5
#define LED1_NYALA  PORTD |= (1<<LED_SATU)
#define LED1_PADAM  PORTD &=~(1<<LED_SATU)

#define LED_DUA     PORTD7    // pin7
#define LED2_NYALA  PORTD |= (1<<LED_DUA)
#define LED2_PADAM  PORTD &=~(1<<LED_DUA)

const unsigned long limit1Padam = 2000;  // 2detik
const unsigned long limit1Nyala = 1000;  // 1detik

const unsigned long limit2Padam = 5000;  // 5detik
const unsigned long limit2Nyala = 1000;  // juga 1detik

// mulainya nyala
unsigned long start1Nyala, start2Nyala;

// mulainya padam
unsigned long start1Padam, start2Padam;

volatile boolean led1Status=false, led2Status=false;
const unsigned long limitDetik = 1000; // per 1detik
unsigned long timerDetik;
unsigned long t_now;

void checkLampu() {
  t_now = millis();
  if(led1Status) {    // led1 lagi nyala
    if(t_now-start1Nyala >= limit1Nyala) {
      LED1_PADAM;
      led1Status = false;
      start1Padam = millis();
    }
  } else {            // led1 lagi padam
    if(t_now-start1Padam >= limit1Padam) {
      LED1_NYALA;
      led1Status = true;
      start1Nyala = millis();
    }
  }

  if(led2Status) {    // led2 lagi nyala
    if(t_now-start2Nyala >= limit2Nyala) {
      LED2_PADAM;
      led2Status = false;
      start2Padam = millis();
    }
  } else {            // led2 lagi padam
    if(t_now-start2Padam >= limit2Padam) {
      LED2_NYALA;
      led2Status = true;
      start2Nyala = millis();
    }
  }
}

void setup() {
  DDRB |= (1<<LED_SATU);
  DDRB |= (1<<LED_DUA);
  LED1_PADAM; LED2_PADAM;
  start1Padam = start2Padam = timerDetik = millis();
};

void loop() {
  if( millis()-timerDetik >= limitDetik ) {
    checkLampu();
    timerDetik = millis();
  }
  _delay(10);
};

void _delay(const unsigned long delayTime) {
  unsigned long delayStart = millis();
  while(millis()-delayStart<delayTime) {}
};