Floating menu options

I´ve searched on the foruns but found nothing about this.

I´d like to make some buttons to “float” over an area of the stage with AS so the movement is random and smooth.

Once one of the buttons is clicked, the others would go to the corner and the pressed button would go to the top so it is the “tittle” of the text the should open.
The other buttons would remain “floating” but in a smaller and pre-defined area of the stage, still beeing clickable.

Hope I´ve be clear and somebody could help me.

thanks