Thanks Nightshft.
Just found one wip sketch on my phone, that I draw on my real Amiga 500 year, or so, a go. I think it has nice potential for some nice coloring. If the wall behind is black (or dark), I can already see nice dark blue moody colors on it.
I wish I could finish it now, but I can't, as my A500 is fully operational and on, but currently I don't have space to sit, and place my mouse.