#define Boton 18
#define LED 22
int estado_boton = 0;

void setup ()
{
  pinMode (LED, OUTPUT);
  pinMode(Boton, INPUT_PULLUP);

}

void loop ()
{
  estado_boton = digitalRead(Boton);
  
  if (estado_boton == LOW)
   digitalWrite(LED, HIGH);
else
 digitalWrite (LED, LOW);

}