This is the third piece in the metallic Art/Mathematics triptych. It is another composition of Phi-based 'golden triangles', but in this case, the triangles are arranged in a spiral pattern with somewhat diagonal symetry and ascending sizes. If you look closely you can see how the triangles interlock and create the spiral. This is counterpointed with some intersecting golden triangles at mid-height. All are articulated by alternating the colors and types of metals.
The photo of this piece shows a little more of the torch-induced spectral colors in the aluminum can metal than the photos of the other pieces. In reality, there is much more of color but the photo just doesn't capture it well.