I made a brush tied to a target_button entities.
The top texture is flatbed_lite2
It's not a native animated texture so I need to change it to flatbed_lite1 when the button is pressed, making a 2 states button.
It easy but I don't know how to do it. So easy, actually, that it must have been settled in a former thread since long but I didn't find one.
Here I am repeating errors from the past.