Black Dzambala terma by Rigdzin Godem ?

[konstantinspb]

Hello vajra people,
I have question about one detail in visualization for sadhana Black Dzambala (terma by Rigdzin Godem)

There's precious and divine palace arises from the seed syllable BHRUM,
Sitting on five elements standing on each other

It's likely, that "five elements standing on each other" is five element stupa


And I think elements must stand upside down, cause it's all arises in visualization, then it starts from space element, then air, fire, water, earth elements.
Thus BHRUM stands on earth element.

It's my thoughts about this piece of visualization, but may be someone knows for sure what is the order of elements and their color for this particular sadhana ?