Last week I wrote the Newbie Guide to Installing Susy, and I’m a big fans of Susy as it does some of the heavy lifting for maths for Sass by calculating gutters and columns. However, its documentation doesn’t lead by example so I’ve put together the following CodePen (CodePen last week started supporting Susy) to illustrate how to easily create your own susy grid. 

Due to the maths, it make take a minute for this to compile over at CodePen