How can i go page 2 from page1 in code

[TEMPO_one]

Hi i am new in here i am looking to what can i do in this internet site but i don't know how can i write code to going page 2 from page 1 please help

[TIMAI2]

see here:

http://ai2.appinventor.mit.edu/reference/other/manyscreens.html

and here:

https://puravidaapps.com/manager.php