Looking for 9 patch babyquilt pattern.?

Hi I'm trying to find out the exact measurments to make a crib sized quilt. finished size 33inX42in. This is going to be my first quilt, So I would like a easy but nice pattern. I wanted to make the patches with 3 different color strips but I don't know the exact measurements I should cut the strips and the process. Is there a website with any information. Thank you for your time.