// 버튼 및 LED 출력 신호 선언
//https://post.naver.com/viewer/postView.nhn?volumeNo=30091890&memberNo=46049982

/* int BUTTON_PIN=7;
const int LED_PIN=3;

int ledState=HIGH;
int lastButtonState;
int currentButtonState;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);

  currentButtonState=digitalRead(BUTTON_PIN);

}
void loop() {
  // put your main code here, to run repeatedly:
 
 /* lastButtonState=currentButtonState;
  currentButtonState=digitalRead(BUTTON_PIN);

  if(lastButtonState==HIGH && currentButtonState==LOW){
    Serial.println("The button is pressed");

    ledState=!ledState;

    digitalWrite(LED_PIN,ledState);
  }
  */
  /*if(digitalRead(BUTTON_PIN)){
    delay(25);  
    if(digitalRead(BUTTON_PIN)){
      if(ledState){
        ledState=LOW;
      }else{
        ledState=HIGH;
        delay(500);
      }
    }
    if(ledState){
      digitalWrite(BUTTON_PIN,LOW);
    }else{
      digitalWrite(BUTTON_PIN, HIGH);

    }
  }
}
*/
int buttonState=0;

void setup(){
  pinMode(7, INPUT);
  pinMode(3, OUTPUT);

}
void loop(){
  buttonState=digitalRead(7);
  if(buttonState==HIGH){
    blink_led();
  }else if(buttonState==LOW){
    digitalWrite(3, LOW);
  }
}

void blink_led(){
  digitalWrite(3, HIGH);
  delay(500);
  digitalWrite(3,LOW);
  delay(500);
}