IntroductionToCreateEngineeringDesign/LEDBlink at main · CSH2315/IntroductionToCreateEngineeringDesign · GitHub

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#define PIN_LED 7

unsigned int cnt;

void setup() {
  pinMode(PIN_LED, OUTPUT);
  digitalWrite(PIN_LED, HIGH);
  cnt = 5;

}

void loop() {
  digitalWrite(PIN_LED, LOW);
  delay(1000);
  digitalWrite(PIN_LED, HIGH);
  delay(2000);
  while(cnt > 0) {

  digitalWrite(PIN_LED, LOW);
  delay(100);
  digitalWrite(PIN_LED, HIGH);
  delay(100);
  --cnt;
  }
  while(1){
    digitalWrite(PIN_LED, HIGH);
  }

}