background_classic.jpg
 - author:  Brenda Clarke
 - source: https://www.flickr.com/photos/brenda-starr/6012553881

backgound_fruits.jpg
 - author: Thanasis Anastasiou
 - source: https://www.flickr.com/photos/nasos3/4057918728

background_highvisibility: 
- author: webtreats
- source: https://www.flickr.com/photos/webtreatsetc/4451865583