int buttonPin=2;
int ledPin=13;

void setup() {
  // put your setup code here, to run once:
 pinMode(13, OUTPUT); 
 pinMode(2, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(2) == HIGH){
    digitalWrite(13, HIGH); 
  }
  else{
    digitalWrite(13, LOW);
  }
}