Disable showing the theme when there is an update

Is it possible to hide or disable showing the theme while updating because I do not want to show customer the theme of updating?

I'm not quite sure what you're asking. Are you asking to hide wyUpdate when it's updating? Or are you asking how to change the theme (that is, the configurable images) of wyUpdate?

Sorry for my unclear question, I mean I want to hide wyupdate when the user click Upate Now.