You can get similar desktop backgrounds here http://www.hqwalls.com/2009/11/aurora-borealis-abstract-widescreen-backgrounds.html
I want to say thanks to everybody that is using this theme (above 20k daily users) and thank you for the wonderful reviews.
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Sieht toll aus :)
Rated 5 out of 5 stars by Julia_195 on May 25, 2016
Looks great! Need I say no more.
Rated 5 out of 5 stars by BonsaiGil on February 23, 2016
It's no wonder so many people love this theme. It's really awesome.
Rated 5 out of 5 stars by Christian Reese on February 16, 2016