I was driving to Palma city talking to a friend on the mobile.It was around 21:30 hours so it was darkI saw some lights over the road 300 meters apart and I was going in that direction.I though it could be something the closest restaurant was making to advert people.Once I was closer I realized the were round white lights.There were 20 or 30.I couldn't stop in the road until 200 meter after.I had the feeling the could be souls.After a minute they went upper not very fast but absolutely silence.