Diagnol Box Stitch is also called 'Brick' or 'Crazy' Stitch. You can use two colours but only in alternate rows otherwise the pattern will end up in opposite colour.
This is a gorgeous, close-knit stitch. By working it on the diagonal you can measure the sides and determine when you've gotten it to the width you want, without having to bother with figuring out a multiple etc.The best place to start is at the beginning. We begin with a slip knot.
Row 1: Chain 6. Then double crochet in the 4th chain from hook, then dc in chains 5 and 6 (in future I will just say dc in 4, 5, and 6th chains and you will remember that it is the 4th chain from hook, right?). That's your first row. It's true. This IS your first row. :-) (Don't forget to click on the thumbnails to see a larger pic.)Row 2: Now you're going to do your first INCREASE row (Well, you could say Row 1 was also an increase row since you had nothing to begin with). Chain 6, dc in chains 4, 5 and 6, flip row 1 up (Pull it towards the front in a flipping motion),
Insert hook under the chain-3 of the row 1 "box" (shell or whatever you want to call that grouping), slip stitch to join,
Chain 3, 3 dc under same chain-3 grouping. At this point you have TWO rows of your pattern completed
CHANGING COLOUR
Row 3: Drop Color A (the one you're using) and join Color B (new color), Chain 6 using new color. If you were making a larger item using color changes every two rows, you would not have to cut Color A here although you certainly can cut if you want to. You would carry it up along the side. You can do that now for this sample. In future if you do cut, be sure you leave at least 4-6" for sewing in later. If you are changing colors less often than every two rows (like every four rows, for example), then you should not carry, but cut.
your completed two colour pattern will look like follows:-
