Recent content by MJ's always in my heart

http://fungameplayer.com/randomnumber.php that's the code i asked this answer before but I didn't get a clear answer can someone please give me like step by step instructions on how to get this to work? i've tried everything but it's not working, thanks.

http://fungameplayer.com/randomnumber.php i'm using this website and i want this code for my tumblr page but how do you get it like what would you have to do? it says put that code in your between your php tags <? and ?> but how do you do this? please help:(