(SOLVED) Change GUI button appearance on click

[Kandessa]

How can I make a button change its appearance when I click on it and then make so it stays that way until I click on the same button again then it goes back to normal?
The closest answer that I found was this old post: https://www.adventuregamestudio.co.uk/forums/index.php?topic=24034.0
But the solutions given in that topic doesn't work for me.
I'm also using the 3.4 version of AGS.

[Cassiebsg]

You have a manual along with the editor. 
Click Help, and choose Index, then type "Button" in search box & pick "Button.NormalGraphic".

There you can see that all you need to do is:

btnNAME.NormalGraphic=20;

replace btnNAME with the name of your button, and 20 with the sprite number. 

[Kandessa]

You have a manual along with the editor. 
Click Help, and choose Index, then type "Button" in search box & pick "Button.NormalGraphic".

There you can see that all you need to do is:

btnNAME.NormalGraphic=20;

replace btnNAME with the name of your button, and 20 with the sprite number. 

Hello, so I've already tried that.
And the problem is that although the button does change when I click on it, it doesn't go back to its previous state when I click on it a second time.
But still, thanks for the reply. 

[Slasher]

If its just alternate image on click...

Example:

Code: ags

if(btnNAME.NormalGraphic==20)
btnNAME.NormalGraphic=30;
else
btnNAME.NormalGraphic=20;

[Kandessa]

If its just alternate image on click...

Example:

Code: ags

if(btnNAME.NormalGraphic==20)
btnNAME.NormalGraphic=30;
else
btnNAME.NormalGraphic=20;

Oh my God, a million thanks to you! I was really struggling trying to solve this button problem.