2.3. Do’s and Don’ts
A common error when you are dealing with Script-Fus is that you simply bring them up and press the OK button. When nothing happens, you probably think that the script is broken or buggy, but there is most likely nothing wrong with it.
A simple way to see if the script did anything is to check menu Edit, Undo. If your script made any changes to the current image, it will be listed as the last undo action.