A Wink, Wink, Blink
Noun and する verb
まばたき
またたき
瞬きせずに、この絵を見続けてください。
Don’t blink and just keep looking at the picture please.
A blink is a blink and a wink as well, depending on how many eyes you use.
A wink is all it takes to get the "Ma butter" (まばた) from the store. It's hidden, and they only bring it out if you do the wink.