auto refresh popup screen

Hi Team,

We have a requirment in which when the user clicks a button there should be a pop up message dispalyed for 15 secs and then it should get auto refreshed and the user should land to the home screen.
As far i know, we dont have any such thing in appian to create a pop up screen but can utilize the a!buttonWidget where we can use confirmMessage property to achieve the pop up. In my case, we dont need the buttons in that message, but it appears by default in button widget. 

How can i remove these buttons and also how do i achieve the auto refresh thing? Please suggest.

Thanks.