3, 6, 9 Nebula Series
Using freehand spray paint with no stencils or blocking is difficult. The artist manipulates the medium to take on amorphous cloud formations or seeming galaxy clusters. The Nebula Series draws it's name from how similar some paintings look to galaxies via the colored images we see.
The markings are also all made in groupings of 3, 6, 9, and also 1. This is a recognition of the relevance of Nikolai Tesla's belief that the universe is mathematically made up of the numbers 3, 6, and 9.
They together draw reference to the makings and basis of the universe.