int ledpin=8;
int buttonpin=7;
int last_state=HIGH;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(buttonpin, INPUT_PULLUP);
  pinMode(ledpin, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
  int  value = digitalRead(buttonpin);
  if (last_state != value)
  {
    last_state=value;
    if (value==HIGH)
    {
      digitalWrite(ledpin, LOW);
      Serial.println("led is on button pushed");

    }
    else{
      digitalWrite(ledpin, HIGH);
      Serial.println("pressed");

    }

  }

}