int btn = 8;
int led = 9;
boolean btnout;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(btn, INPUT);
  pinMode(led, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  btnout = digitalRead(btn);
  if(btnout == 1){
    digitalWrite(led, HIGH);
  }else{
    digitalWrite(led,LOW);
  }
}