int const led = 13;
int const button = 12;
int const potenciometer = A0;

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

}
void loop(){
  // put your main code here, to run repeatedly:
 int btnValue = digitalRead(button);
Serial.println(btnValue);
if(btnValue == 1){
  digitalWrite(led, HIGH);
  }
else if (btnValue == 0){
  digitalWrite(led, LOW);
}
}
void potenciometer {
 int potValue = analogRead(potenciometer)
 Serial.println(potValue);
}