Try looking at this with this music in mind: [link]
this is a repetitive background (or whatever you call these), which means you can just stick it on a website or your desktop, have it on repeat, and it should flow nicely. I have it on a fairly big size so you can choose to adjust it if you have a smaller screen.
Some of my favourite miyazaki characters for my tumblr background. I did this with the thought of the music example i put above in mind; i feel like it'll be a good combination for my tumblr, but I'll actually work on changing my tumblr stuff tmr xDD;; I got a little too into drawing each character so it's actually super duper detailed @__@;;;, which is why this took so much longer than I anticipated.
feel free to use this for your personal websites/tumblr, but please please put a link there that will credit and link back to me! Thanks so much! For best tumblr/website results though, it's best if you reduce the size in photoshop and save-for-web-device. you can even reduce the quality so it's below 1mb, so it'll load a lot faster when people come on your page.