There are 3 pages of wordpress:
http://107.170.21.244/wp2/?page_id=4
http://107.170.21.244/wp2/?p=7
http://107.170.21.244/wp2/?p=1
The task is to write, in the functions.php file, a function that, depending on the GET parameter, displays different content on these pages. I hope all described is available.