// Nattawut Sirakaw 116430205008-6
#define LED_1 15
#define LED_2 2
#define Delayms 1000

void setup() 
{
  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
}

void loop() 
{
  Blink_LED1();
  Blink_LED2();
  Blink_LED1();
  Blink_LED3();
}
void Blink_LED1()
{
  digitalWrite(LED_1, HIGH);digitalWrite(LED_2, HIGH);delay(Delayms);

  digitalWrite(LED_1,LOW);digitalWrite(LED_2,LOW);delay(Delayms);
}
void Blink_LED2()
{
  digitalWrite(LED_1, HIGH);delay(Delayms);digitalWrite(LED_1,LOW);delay(Delayms);

  digitalWrite(LED_2, HIGH);delay(Delayms);digitalWrite(LED_2,LOW);delay(Delayms);
}
void Blink_LED3()
{
  digitalWrite(LED_2, HIGH);delay(Delayms);digitalWrite(LED_2,LOW);delay(Delayms);

  digitalWrite(LED_1, HIGH);delay(Delayms);digitalWrite(LED_1,LOW);delay(Delayms);
}