How to make websites 3DS formatted/fitted

Hello. I am Joshi, the creator of Joshi 3DS, and I am here to teach you how to make your website 3DS compatible (although it may turn out to be sized as if it's DSi compatible). Here's a website "full" HTML code example:

%60html%62<br>%60meta name="viewport" content="width=400"%62<br>%60title%62YOUR TITLE%60/title%62<br>%60head%62<br>%60style%62<br>body{margin:0;}<br>#topscreen{width:400;height:220;overflow:hidden;}<br>#bottomscreen{width:320;height:212;overflow:hidden;margin:0 auto;}<br>%60/style%62<br>%60/head%62<br>%60body%62<br>%60div id="topscreen"%62TOP SCREEN CONTENT%60/div%62<br>%60div id="bottomscreen"&62BOTTOM SCREEN CONTENT%60/div%62<br>%60script%62<br>window.setInterval(function();{<br>window.scrollTo(40,220);<br>}, 50);<br>%60/script%62<br>%60/body%62<br>%60/html%62
Note: "margin:0 auto;" means that the content in the area of the section that "margin:0 auto;" is in, will be automatically centered. BTW the script at the bottom auto-scrolls the page, even if you scroll elsewhere.