Name a switch guyspeak. Now on the event which possesses the graphic of the guy, make a conditional branch...
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:If:
:Switch guyspeak=OFF
:Show text = "LOLZ"
:Turn Switch guyspeak ON
:Else:

:If:
:Switch guyspeak=ON
:Show text = "Kicking puppies is fun."
:Turn Switch guyspeak OFF
:Else:

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So try that out. Pardon my Pseudocode. Switches aren't really very hard, after an hour or so.