We were sitting on our balcony looking out to sea across to benidorm island when a strange object suddenly appeared to the right of the horizon. it kept haphazardly pulsating and appeared to change shape and glowed. it moved from west to east and appeared to go over the top of benidorm island and then we could not see any more as our view was obstructed by several buildings, as shown in the picture taken the following morning. at first, we thought it was an aeroplane, but then realized it definitely was not as many aeroplanes pass over the island and none of them looked anything like what we saw. we both felt very excited at the thought that it could have been a ufo.