void setup() {
pinMode(2,OUTPUT );
pinMode(3,OUTPUT );
pinMode(4,INPUT_PULLUP);
pinMode(5,INPUT_PULLUP);
pinMode(6,INPUT_PULLUP);
}

void loop() {
if(digitalRead(5)==LOW){
  digitalWrite(3,HIGH);
}
if(digitalRead(6)==LOW){
  digitalWrite(2,HIGH);
}
if(digitalRead(4)==LOW){
  digitalWrite(3,LOW);
  digitalWrite(2,LOW);
}
}