X marks the spot

My contribution for the Come Slide With Me group's Slip Sliding Away challenge #6 based on image shared by Paul (autofantasia): www.ipernity.com/doc/autofantasia/40856426/in/activity

On GIMP I used tiles, duplicated the layer, and then polar coordinates into square. Layer mode darken. Finally some curves to make the colours darked.

I decided to participate this time because those colours are just so sweet!