midst in the city of zuerich in switzerland i observed, at 22:30 hrs CET, two formations each one comprising some 25 to 30 ufo's.the night was clear, and on the other side of the sky the moon had just apeared. the lights where quite pale, in the size of twice the size of brightest star.the velocity seemed quite slow to me.(somehow like a flock of seaguls flying high) both formations had a shape of an strongly elongated egg. the flight patterns of both formations where irregular...the first formation showed some of the lights where doing sorta snake-path-pattern the first formation had goldish/yellow lights. right after the first formation came a second one, about 3 seconds later. the lights on this one where green, blue , and yellow (or red, i may be wrong here) right after this second formation, came another group of some 5 or 6 red ufo's, three times the size of the first ones, and all red. they where flew so close together,that at times they looked like just one craft.they where flying wildly around eachother. the size of these i can explain as follows: if one streches the arm , one of the red lights had the size of the smallest fingernail, when they where very close together, it looked like the size of a thumb. this is the second formation-flight i could observe, my first formation sighting was about 2 years ago, same formation and flight patterns, with white/very light blue lights.