Went from triangle shaped to spherical, with different colored lights flashing

I was driving back to my hotel after I had been in town at a wedding that weekend. It was late, approximately 10:40pm. I was driving in my car on a main road in the town I was staying in and some flashing lights caught my eye in the sky through the upper left corner of my windshield. I looked up and out, expecting to see an airplane. It seemed low in the sky, like about where a commercial jet would fly, or maybe even a bit lower like when a plane will come in to land. My mind was having trouble processing what I was seeing and it happened so quickly, but I initially saw a triangle type object which I first mistook for a plane. There was lights blinking on it sporadically, green/red and possibly bluish white. It wasn’t blinking off and on, it was more erratic, like a lot were going on and off at the same time. Then it seemed to morph into a spherical shape rotating in the sky, still flashing with the sporadic colorful lights. And then it was just gone. It was there and then it wasn’t. I didn’t see it zoom away. It was just there and then not. Like someone flipping off a light switch. It was so bizarre. I kept looking out my car windshield while also watching the road and I couldn’t see anything else. I was only a few blocks from my hotel so when I parked I scanned the night sky and I saw nothing out of the ordinary. I hesitate to even share this account since it was so quick and I was by myself in my car. I barely had time to process what had occurred, my whole sighting happened in probably 30 seconds or less. I’m hoping maybe someone else saw something strange around that timeframe that could potentially validate my sighting as well. The night was clear, and pretty warm out. I don’t remember seeing any clouds that could obscure my vision.