#define s 9
int x;
#define led 8

void setup(){
  pinMode(s, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);
}
void loop(){
  x= digitalRead(s);
  Serial.println(x);
  if(x==0){
    digitalWrite(led, LOW);
  }
  else{
    digitalWrite(led,HIGH);
  }
}