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//Eunice Yuan's BlueEyes_BUT_Green, Oct 29th 
int ledGreen = D2; 


void setup() {


  pinMode(ledGreen, OUTPUT);

}

void loop() {

  //ON 
  digitalWrite(ledGreen, HIGH);

  // 1 Second
  delay(1000);
  
  //OFF
  digitalWrite(ledGreen, LOW);

  // 1 Second
  delay(1000);

  // And repeat
}
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