#define led 23
#define botaoA 4
#define botaoB 5

void setup() {
  pinMode(led, OUTPUT);
  pinMode(botaoA, INPUT_PULLUP);
  pinMode(botaoB, INPUT_PULLUP);
}

void loop() {

  if(digitalRead(botaoA) == LOW){
    digitalWrite(led, HIGH);
  }

  if(digitalRead(botaoB) == LOW){
    digitalWrite(led, LOW);
  }
}