I have made a theme (attempted anyway,) and there seems to be an issue, the screen turns out transparent grey, with all my coding jumbled in the background. I don't know what I did wrong, and I'm not that good yet at CSS or HTML. Could someone maybe help out by checking to see what I did wrong? I just wanted to make my own theme. I would really appreciate it. Thanks. 
Heres the link: http://freetexthost.com/sou5wkxkd5
Heres the link: http://freetexthost.com/sou5wkxkd5