PRO MAKEUP HAXX:
to make people think you've spent much more time doing your eyeshadow than you actually have, get a large 'toothbrush' style brush and a rainbow highlighter, put down some glitter eyeshadow primer, and then load up the brush with rainbow highlighter and roll it onto your eye all at once, then do the lid itself some other color since that's where it's not gonna transfer too good and fill in the edges with a brush as needed
and BAM! RAINBOW!
(selfies with eye contact follow)
note: you'll have to clean up the fallout underneath your eye but once it's on there it stays pretty well, my under-eyes are looking especially grungy because this was immediately after i had physical therapy and my mascara was being complainey + didn't use any under-eye concealer, just bb cream today
it looks impressive but is really quick to do, and would be v cute for st patrick's day, especially if you do your lids green