Here is a vector of abstract background form eps10.net. This image is a vector illustration and can be scaled to any size without loss of resolution. This image will download as a .eps file. You will need a vector editor to use this file (such as Adobe Illustrator).
Name: Abstract Background Vector Image
Homepage: EPS10
License: Creative Commons Attribution 3.0
File Type: EPS
This image is a scalable vector graphic and can be scaled to any size without loss of resolution. This image will download as a .eps or ai file. You will need a vector editor to use this file (such as Adobe Illustrator or CorelDRAW).