The kit probably says to use 1/4" seams, and that will be critical to your success. Test to be sure you're sewing 1/4" seams. There's a tutorial. Look under Main - Tutorials, p. 2 " ShelleyQ - Beginner Blocks #1: the 9-Patch and Variants" Scroll down - there's a section on how to test yourself to see if you're sewing a perfect 1/4" seam - WITH PICTURES!