int led1=2;
int pb=7;

void setup() 
{
  // put your setup code here, to run once:
Serial.begin(96000);
pinMode(led1, OUTPUT);
pinMode(pb, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:
int buttonState = digitalRead(pb);
if (buttonState == LOW){
  Serial.println("The button is pressed");
  digitalWrite(led1, HIGH);

}
 else
 if (buttonState == HIGH){
   Serial.println("The button is unpressed");
   digitalWrite(led1, LOW);
 
}
}