quick SAI fringed BG tutorial

**WHOOPS,, forgot to keep that canvas outline in the tutorial :'') but just know, don't put it up to the canvas edge~

//dies
Just figured I'd show you guys how I do this fringe method that I use for some of my drawings
 hope the instructions are clear enough, this tutorial was just really spur of the moment, so I dont really care about how it looks like too much :') 

But yeee, enjoy. 

Also, Im pretty sure you can do this on any other paint program, i just don't know how to do it :'') 
also also, this lovely character belongs to Sailor-Ahoge, I thought of this tutorial from doing their commission, ty!