aaaaaaaaaa i don't want to just use the image as-is even if this is just for internal use
i have no idea about blender and my drawing skills are less than pathetic so let's just use this code https://math.stackexchange.com/questions/2167301/how-to-plot-a-hole-in-a-hole-in-a-hole/2167479
loos v rough anyway so if anything I will use this as a starting point
thankfully this is a topological space so rough edges are forgiven
it's the hole in a hole in a hole from Spivak's differential geometry btw
you may know it from the numberphile video where a guy finds the canonical form of this surface blowing glass