mouth.speed = 150

mouth.visible = true

mouth.top = 820

mouth.left = 300

If you want to use this for another character you may need to edit the top and left values.
Dont know how to code? its's simple! just copy this code and go to your RH. add a new command and chose "script". Type as the phrase anything you wish to execute the code with. example: "Hello". Now got to the script textbox and paste the code. press add and make your RH listen. Now just say "Hello" to see the fun action!