To interconnect the screens we need a navigation. After all, a login-button should bring the user to the first screen of the application and the back-button is said to bring the user to the previous screen. You really should stick to those conventions when you want your application to be accepted.
As our demo app isn’t that complex the navigation is easy as well. We need five navigation steps, two forward and three backwards. To configure the navigation between two screens we choose an Event (this is pressing a button) and assign the event to the button. For the field Navigation we choose the target screen. Now we can preview the application and check whether all navigation is correct or not.
For now our application looks good.