A few minutes after nightfall, around 8 p.M., i went outside for a walk (as is my habit in the summer, to avoid the heat of the day). i walked on the sidewalk in front of my residence. the sky was clear. at 8:26 p.M. (cst), i noticed an unusual light approaching from the east. since i live relatively close to a municipal airport, i am well acquainted with seeing aircraft in the night sky. but i quickly realized this object was different. it flashed and pulsated with a white light. quickly i grabbed my digital camera (which i keep on hand for situations such as this, since i have experienced multiple ufo sightings at night in my lifetime). it wasn't until afterward reviewing the video that i realized the object appeared to be rotating. also, there was one big light in the middle with two smaller lights - one on top and the other on bottom. it appeared to fly in an upright, vertical position. i have included the video, along with still shots, with this report for documentation.