The ufo sighting happened while I was watching the BHS soccer game. Out of nowhere, a purple light appeared from the sky and caught my attention. A couple other spectators saw the ufo also. When I first saw it, I thought it was a drone, but as I watched it, I noticed it didn't have an iPad or anything connected to it, and it didn't go in any certain pattern of movement. The ufo also slowly rotated counter-clockwise. I quickly took out my phone and got a picture of it. The ufo hovered just outside the field flying in circles and going back and forth, while it rotated. The ufo also went low to the ground at one point. I hovered there for a couple minutes before rising back up into the air. I lost sight of it after about 20-30 minutes when it flew away from my direction and disappeared behind some trees.