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The rather detailed Des_chiffres.png of 27 april looks like a drowning light blue cartoon character, with 2 light blue feet. As if the game can be quite hard. I had to zoom to see what it actually was: numbers. I'll try to use the released, simple Galgje.png. If anything to stick to a generic border theme.
Not an *.ICO file request, but a doodle in text. KMP, K Movie Player: the Korean flag, positive or negative, as a 3-D film frame of a 3-D Movies folde'ishr-icon, with and without the folder (KMP folder, KMP drop target, KMP UI). IIRC the Korean flag also was a little bit too detailed to make that work, even if you did restrict yourself to a smallest size of 40x40.
I thought at one time there was a grid spacing feature, but I do not see it in ArcaOS.
Old question, younger answer: I'm not using ArcaOS, but you may have been talking about Extended Desktop and its setting (tabs of the settings of the desktop), NPSWPS, or OO.EXE or a Rexx script (with or without WPTOOLS.DLL to query existing icons) which tries to set icon positioning by using WPS setup strings like ICONGRIDSIZE or ICONPOS. BUILDVRX.CMD of Watcom VX-REXX includes an example of ICONPOS, but nowadays I'd set its default screen size to its largest known screen size of 1024x768 instead of an outdated 640x480. The screen size is used to calculate ICONPOS-values.