So then why don't you start right away on finishing that red and white quilt?
Because of the terrors, the scary stuff that creeps inside your head. Like: I worked on those blocks for 49 weeks and now they are going be ruined by:
-the layout of my sashing (the fear of going too modern for it to look good or too traditional for my own liking)
-the colors might run into one pink mess when I finally wash the quilt
-I won't be able to cut the fabric for the sashing straight and I'll have a pile of unusable scraps
So that's why I haven't started yet.

This is the design I decided on. I truly don't know if it'll work but I'm just going to do it. I can do some laying out on the floor before I sew everything together to check if it isn't horrible. So I think I have that fear covered.
I'm going to buy some super color catchers that looked amazing in the commercial (ha ha) so they should help me with that washing fear. Also I heard that the most important thing in preventing the running of colors is taking your quilt out of the washing machine right when the machine has finished. So no leaving it for a while. Stay at home, with your ear to the machine. I'll do that. (I always do that)
The last fear, well. I know I can cut straight enough. Maybe it won't be perfect but perfect enough is also really good.
Just get on with it now!!