Gestures on Staff Page - Help!

[Candidate]

I want to make it so user avatars on the homepage smile, and i don't know the gesture code to enter (here's an image incase you don't know what i'm talking about):

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if anybody can help with this, thank you in advance

 

[SaW]

gesture=sml

 

[Joe]

If stuck these can be found on Google for others.