#define led1 5
#define led2 7

void setup() {
// Led
    pinMode(LED_BUILTIN, OUTPUT);
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
}


void loop() {
  // put yourmain code here, to run repeatedly:

     digitalWrite(LED_BUILTIN, 1);
    digitalWrite(led1, 0);
    digitalWrite(led2, 1);
    delay(500);
    digitalWrite(LED_BUILTIN,0);
    digitalWrite(led1,1);
    digitalWrite(led2,1);
    delay(500);
    digitalWrite(LED_BUILTIN,1);
    digitalWrite(led1,1);
    digitalWrite(led2,0);
    delay(500);
   
}