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+Rock, Paper and Scissors images are from https://www.iconfinder.com/
+(they are still striped, as printed on the website, since I didn't pay for them)
+
+Spock image was found here http://all-free-download.com/free-vector/download/spock-star-trek-cartoon_52494.html
+
+Lizard image was found here http://www.symbols-n-emoticons.com/2014/07/likable-lizard.html