#define LED_1 15
#define LED_2 2
#define DelayMS 500
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LED_1,OUTPUT);
  pinMode(LED_2,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  
  digitalWrite(LED_1, HIGH);
  delay(DelayMS*2);
  digitalWrite(LED_1, LOW);
  delay(DelayMS*2);

  digitalWrite(LED_2, HIGH);
  delay(DelayMS*2);
  digitalWrite(LED_2, LOW);
  delay(DelayMS*2);
  
  digitalWrite(LED_1, HIGH);
  digitalWrite(LED_2, HIGH);
  delay(DelayMS*2);

  digitalWrite(LED_1, LOW);
  digitalWrite(LED_2, LOW);
  delay(DelayMS*2);
}