void setup() {
 pinMode(8, OUTPUT);
 pinMode(9, OUTPUT);
 pinMode(10, OUTPUT);
 pinMode(2, INPUT_PULLUP);
 pinMode(3, INPUT_PULLUP);
 pinMode(4, INPUT_PULLUP);
}

void loop() {
 
    if(digitalRead(2)==0){

      digitalWrite(8, HIGH);

    }else{

      digitalWrite(8, LOW);
    }

    if(digitalRead(3)==0){

      digitalWrite(9, HIGH);

    }else{

      digitalWrite(9, LOW);
    }

    if(digitalRead(4)==0){

      digitalWrite(10, HIGH);

    }else{

      digitalWrite(10, LOW);
    }
}