HELP!!

Thought I would try and jazz up my background tonight as it was rather boring, why didn't I just leave it alone as I have now gone and totally mucked it up. Have spent the last hour or so trying to sort it out unsuccessfully. Am off to craft now, will have another look tomorrow. Any hints and tips gratefully received....

Have now managed to get some of the elements back - phew..... Would still like to add a better background but think I will quit while I'm ahead tonight.