Very nice work, Tom. As others have mentioned, I like the choice of colors and the composition. But for me the most appealing element is the implied sense of motion imparted by the green rings on the right and the green tendrils on the left. They give the appearance that they are being flung from the center of the structure. Well done!
Thanks, the appearance of being flung from the center outward was my intention as I set out to make the piece. The rings just happened. You never really know how the rings variation will act. In this case it was perfect for me.