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int led1 = D2;

void setup() {

pinMode(led1, OUTPUT);

}


void loop() {
  
for (int i = 0; i < 5; ++i)
{
  digitalWrite(led1, HIGH);
  delay(500);
  digitalWrite(led1, LOW);
  delay(500);
}

digitalWrite(led1, LOW);
    delay(3000);

}
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