The floss colors in the 'Night, Neighborhood Sampler kit are arranged in two groups, A and B. To organize them, please consult page 2 of the pattern and make four labeled floss caddies out of chipboard. Then, starting with Group A, separate lengths of floss by color and quantity using the Color Key on page 3 of the pattern, and place them in your labeled slots. To help you separate colors that are close in color and the same in quantity within a group, these photos may help you.
Some of the colors in Group B are a bit tricky to tell apart, but if you use the squares on the Color Key to help you distinguish one color from another, I think you'll be okay. Take your time and do the easiest colors first; when you're left with the rest, separate them into their individual colors and, by process of elimination and these photos, you should be able to get them all sorted properly.