Step One: go to hardware store (preferably a locally owned, small business)
step two: grab all the luminous paint swatches you can...
step three: chop um up...
step four: tack them to the wall & sit back with delight!
Summary: for about $10 dollars including gas, swatches, scissors & pins you can have an amazing work of art that can really be hung, well, just about anyplace you fancy!