Just to showcase a somewhat different approach, I made a simple contraption that encapsulates the task of storing an image and wiggling it around a bit on screen. Contraptions are a handy way to reuse logic that appears multiple times within a deck:
%%WGT0{"w":[{"name":"shaker1","type":"contraption","size":[135,124],"pos":[45,179],"show":"transparent","def":"shaker","widgets":{"c":{"size":[135,124]},"img":{"size":[100,25],"pos":[166,1],"value":{"text":["","i"],"font":["",""],"arg":["","%%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"]}}}}],"d":{"shaker":{"name":"shaker","size":[100,100],"resizable":1,"margin":[1,1,1,1],"description":"take an image and just sorta jiggle it around.","script":"on get_value do img.value end\non set_value x do img.value:x end\n\non view do\n if !9%sys.frame\n i:first img.images\n c.clear[]\n c.paste[i (.5*c.size-i.size)+(random[4 2]-2)]\n end\nend","attributes":{"name":["value"],"label":["Image"],"type":["rich"]},"widgets":{"c":{"type":"canvas","size":[100,100],"pos":[0,0],"locked":1,"animated":1,"volatile":1,"show":"transparent","border":0,"scale":1},"img":{"type":"field","size":[100,20],"pos":[131,1],"show":"none"}}}}}
(You can copy and paste the bit between %%WGT0 and the last } into Decker to try it out!)
The main script of this contraption looks something like this:
