int val;

void setup() {
  // put your setup code here, to run once:
pinMode(5, OUTPUT);
pinMode(3, INPUT);
Serial.begin(9600);
}

void loop() {
val=digitalRead(3);
Serial.println(val);
if (val==1)
{
  digitalWrite(5, HIGH);

}
else
{
  digitalWrite(5, LOW);
}

}