New Post: How to overlay a tiled pattern on a solid background?

original pattern :

http://i.imgur.com/qJtyCqH.png

background color of base canvas is #2980b9.

Output Image of the code above is

http://i.imgur.com/YbBV3Dn.png


I want to achieve this:

http://i.imgur.com/ntdBtL5.png


I am not sure how to do this in command line but in order to tile the square image on the center from the first link . I must use the -tile command line option to compose the tiled background as explained here http://www.imagemagick.org/Usage/canvas/#tile. But, I don't know how to execute the tile parameter in this library. I hope you can help me. Thanks for replying.