At first it looked like a set of balloons, but when I observed more carefully,it looked like some sort of banner,wavering with multiple colours, mainly purple, and a yellow,roughly spherical part of it swaying sideways (at right angles to its direction of motion). Size estimate, about the same as a helicopter. It was a bit far for me to see well.

None except that it was floating silently to the west, too fast for a baloon, to my estimate, the speed of a helicopter at normal cruise mode, then it changed direction to northwest and started ascending until it was too far to be seen, among the cloudy background.

I took a picture of it with my limited pocket pc camera, but hardly anything was in the picture to make out.