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int led1 = D2;

void setup() {
    
    pinMode(led1, OUTPUT);

}

void loop() {
    
    for (int b = 0; b < 5; b++) {
        digitalWrite(led1, HIGH);
        delay(500);
        digitalWrite(led1, LOW);
        delay(500);
        
    }
    
    delay(3000);

}
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