Free mode: click on any icon to have its code appended to the yellow textarea, then click the "Add intro code" button if you want the icons to get aligned to blocks, then copy all the code and paste it into an Arc Sign.
In both modes you may need to adjust the <offset> and <zoffset> tags depending on your design.
V1.6, 22/12/2018, CV R58 (Elfi's Wonderland) - all of the sprites listed in this page should work fine in the game.
+V1.7, 22/12/2018, CV R58 (Elfi's Wonderland) - all of the sprites listed in this page should work fine in the game.
As far as I can tell, some sprites are currently missing (they don't appear here and they don't work in the game).