Animated buttons with text appearing

I have three buttons and what I want to achieve is the following: When you mouse over (check the pic attached) a button the other 2 must vanish and the button you moused over must take the whole space. The text of the button will stay in its place and in the remaining space a text will apear in the right of the button text (each time different). Any help? Thank you very much in advance.

I sort of get it, however could you show me an image of each button when it’s rollovered? i.e. for reference :smiley:

I attach the button when the rollover is over and the text has appeared.Sorry for the greek text…