Led e pulsanti. Variabile booleana.

int cont=0;
bool p1, p2;

void setup(){
  pinMode(13, OUTPUT); // destra
  pinMode(12, OUTPUT); // sinistra
  pinMode(2, INPUT_PULLUP); // destra
  pinMode(9, INPUT_PULLUP); // sinistra
  Serial.begin(9600);
}

void loop(){
  p1=digitalRead(9); //sinistra
  p2=digitalRead(2); //destra
  digitalWrite(12, p1); //sinistra
  digitalWrite(13, !p2); //destra
}