// lab3 Arduino_Switch

#define BUTTON_PIN 4
#define pressed LOW
void setup()
{
  // put your setup code here, to run once
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop()
{
  // put your main code here, to run repratedly:
   int value = digitalRead(BUTTON_PIN);
  if(value == pressed)
{
Serial.println("pressed Switch");
delay(500);
}
}