It might be a good idea to loop the trigger, so players who forget what a sign said don't have to freak out when they click the sign again and nothing happens. If you do this, don't forget to set a timer condition so the instructions don't spam the player's chat history...that makes it really hard to find important chats (like the riddle in Sabato Returns) if you need to recall them or they get erased.
YoshiX100000~AoKH's Official Playtester of All Short, Funny Viking Cutscenes by Varied Equine Species, PhD-Emeritus-Magna-cum-Laude-Esq.
Now in Fuschia!!
"I wish I knew what Yoshi's doing on the roof, especially in winter." ~Sissi
"Yoshi lived up to his name and split into 100000." ~Rocking Doom