Not much information, also impossible to take a great or defined photo. Me and my wife and my mother in Law could verified what seemed first somekind of aircraft aproaching at some distance from the New Year firework in Monte Gordo Beach but then we started to think that was rather some part of it, like a not exploded rocket....then we start to be sure that it was commanded. Sometimes this light that was orange, sometimes pulsating, was more near to the firework sometimes avoid the highest rocket's...and was always moving up and down like it was joking with it. It exhibited acceleration pattern's that showed us that it was no common aircraft. Sound? It is impossible to say because of the rumble of the firework. Around 5 minuts observation until it started moving south in a descent pattern until it disappeared in the horizon or sea (landing?) before the firework ended. We payed more attention to him then the whole firework...