I would like a different theme. Were & how can I get a theme?

ok you need to look for images of say betty boop, save to your pictures on your computer, then go to your 360 page at the top it says edit your theme(or change theme something like that) click on that then up pops a box allowing you to set your theme, at the top you can apply your theme by clicking browse and your pictures come up click on the image you want then click on save , preview if you like it, then click save hey presto up pops your new theme as the background but your image must be a jpeg, ok hope that helps.