int ledPin = 8;
int b1= 7;
int b2 = 6;

void setup() {
pinMode(ledPin, OUTPUT);
pinMode(b1, INPUT_PULLUP);
pinMode(b2, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(b1)==LOW){
    digitalWrite(ledPin,HIGH);
  }
  if (digitalRead(b2)==LOW){
    digitalWrite(ledPin,LOW);
  }
}