How to have a new window after clicking a button

hello..
of knows how make new window appear after clicking button?
know basic question can't seem make it. i've done ones can output type in textfield, problem in app using label.

flow of program:
after clicking done button, should view new window show words(that inside/generated solve button).and then, can close new window , app/original window.

after reading many posts, still don't know how this. can please me?
in advance

kinda urgent..pleassseee
--i newbie

 

what have tried? simple showing alert containing desired text.

 

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