programmatically loop between two WinForm Screens for about 20 seconds on each screen

Hi team
I have two winform screens which show different infomation on each. vb.net
I would like to show Screen1 for 20 seconds and then show Screen2 for 20 seconds and then back to Screen1 again and so on.

Can anyone help with this one
Regards
Ron B

Create a 20 second timer and a bool toggle variable. On the timer click, toggle the variable between true and false. If true, hide one form and show the other, if false do the opposite.