//when pb is pressed, LED should be on .when pb is released,LED should be off.
//Note: here we assume that the kit uses pullup resistor.
//pb is conected to pin D8 of Arduino nano
//so, when pb is unpressed, pin D8 or Arduino nano will remain ON.
//so, pb is pressed pin D8 or Arduino nano will remain OFF.
const int led=12;
const int pin =8;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(led,OUTPUT);
pinMode(pin,INPUT);
}
void loop() 
{
  // put your main code here, to run repeatedly:
  int pin_state=digitalRead (pin);
  if(pin_state==1)
{
digitalWrite(led,0);
 } 
 else
 {
digitalWrite(led,1);
  }
  if (digitalRead(led)==1)
  {
    Serial.println("LED is ON");
  }else{
    Serial.println("lED is OFF");
  }
}