lua help...button

[barbol12]

hello all.. i am trying to make a button, for something i am doing... and having some issues

i have tried multiple codings for this button, and nothing wants to show up in the game... i want to make a button, so that it has 2 different textures(one for normal, and one when i click on it) and i want to be able to load other functions, when i click on it....