UPDATE How to Create Seamless Patterns for Free – Photopea Tutorial – Design Seamless Patterns
http://www.youtube.com/watch?v=i_IQZpArlYw
http://www.youtube.com/watch?v=i_IQZpArlYw
http://www.youtube.com/watch?v=8oXe1y3O1Oc
http://www.youtube.com/watch?v=Kg2Lgro7AEI
http://www.youtube.com/watch?v=RGOfW-HAXdk