void setup() {
pinMode(10, OUTPUT);
pinMode(8, INPUT);
Serial.begin(4800);

}

void loop() {
 int x = digitalRead(8);
 if(x==0)
 {
  digitalWrite(10, HIGH);
  Serial.println("switch on, led on");
 }
 else if(x==1){
  digitalWrite(10, LOW);
  Serial.println("switch off,led off");
 }


}