int LED1 = D6;
int LED2 = D7;
  //for fabriXIAO name pins D6, D7; for arduino uno name pins 6, 7

void setup() {
   // put your setup code here, to run once:
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
for(int i=0; i<10; i++){
  digitalWrite(LED1, HIGH);
  delay(500);
  digitalWrite(LED1, LOW);
  delay(500);
}
for(int i=0; i<10; i++){
  digitalWrite(LED2, HIGH);
  delay(500);
  digitalWrite(LED2, LOW);
  delay(500);
}
}