UFO Flying Wing - Shape shiftingThis event happened in the bright , cloudless afternoon sky of Michigan- metro Detroit. I was fueling my car with everyone else under the gas staition canopy roof. I was standing at the edge of the canopy and with the fuel running I jumped over quick to look at the paper headline in the box then went back to tend the fueling and on the way back something caught my eye high up in the sky. I had to look again to see if it was moving at all. It was. It was drifting slowly in my direction and now it looked closer to the Earth Then when I first noticed it about 20 seconds ago. It looked fairly small. 2-5 feet across. About 200-300 feet up. The object made no sounds. It was drifting in the wind direction basically but not completely. It was if the wind was not affecting it. It moved much slower than the winds which were fairly heavy this day. The sky was cloudless as the wind had blown everything away.The object looked at first like a flying wing. But it had more than one wing. It had wings which changed shape, position and in number about once or twice a second not in a mechanical way but almost in a random way. The wings also were colored in sections and these sections continually changed like a prism changes in the sunlight. They would also stay one color in the wing and then a new wing shape and direction sprouted and a new color came up. Sometimes there would be two or more stripes of color in the same wing until the new shape came in. When this object was the closest to me I could see a streaky gray plasma type cloud hanging from it like a tail. The bottom of it came to a point and there was movement in it like a swirling effect from bottom to top. As it passed overhead the plasma tail became invisible to me.The object left my view as it passed over the rain canopy I was fueling my car under. This event up till now has taken about 60 seconds.I had paid with a credit card so I didn't have to go in and pay. I pulled the car around and out from under the canopy and stuck my head out the window to see it again and it was still up there drifting away and now looked slightly higher again. The plasma tail was visible again. It was still heading slowly in the same direction but still seemed to wander slightly unaffected by the wind speed. I watched it for another 20-30 seconds before it left my sight.