int hallsensorpin = D2;
int positiveled = D6;
int negativeled = D0;

void setup() {
  // put your setup code here, to run once:
  pinMode(positiveled, OUTPUT);
  pinMode(negativeled,OUTPUT);
  pinMode(hallsensorpin, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  if (hallsensorpin == LOW){
    digitalWrite(positiveled, HIGH);
  }
  else {
    digitalWrite(negativeled, HIGH);
  }

}