4 blocks crocheted together
More Fun with Corner to Corner

Diagonal Stripes
This design pattern is well suited for switching colors and using up scrap lengths of yarn.  For the sample, I used a very small yarn to create a piece  that would fit on my scanner, so I used a different color for almost every row.   In larger pieces, I switch colors every few rows.

The wonderful thing about the diagonal stripes is the wide variety of visual patterns you can create with smaller blocks.
Depending on how you place the blocks, you can create Diamond patterns, Large X*s, or zig zags- like a ripple stitch.  You could even get really imaginative and create maze-like patterns.

How To Change Colors with the Increase Rows
When you get to the last stitch of the row, tie off the new color with the old, then clip the old color.
With the new color, make your beginning chain and continue with the next row.

How To Change Colors on the Decrease Rows
When you get to the end of a row, SLIP STITCH WITH THE CURRENT COLOR, back to the Beg Ch of that group.  Tie the new color to the old and clip the old color.  With the new color, Ch 3 and work the rest of the row like you normally would.

How To Connect Blocks As You Crochet Them
Although any corner will work, you will need to do some extra planning and figuring if you are using stripes in a visual design.

Attach the new colored yarn to any corner.

You basically work the stitch as you normally would.  When your stitching comes to the finished block, you sl st into the finished block, in between the corresponding Dc Little Blocks.
Fig 1.

Next, work 2 chs.  Sl St into the finished block, in between the corresponding Dc Little Blocks.  (You want the 2 Ch to be tight against the finished block, which is why I suggest only 2 chs.)
 Fig 2.

Ch 3 & turn. Work 3 Dc around the Ch 2 just made. Continue to work the pattern as you normally would.  Fig 3.

Joining Completed Blocks
Attach the joining yarn to the corners of 2 squares. If you want the seam to show, attach them with wrong sides together.  If you don*t like the seam to show, put the right sides together.

Once the yarn is attached to the squares, Ch 2-3 depending on your tension.  You want this to be tight against the work, so it doesn*t form a loop.  However, you don*t want these chains to be too small and draw the seams up tighter than the rest of the piece.  Fig. 2.

Once you*ve made your Chains, insert the hook in between the next Dc Little Blocks.  Same as Fig. 1.
Sl st or Sc to connect the 2 blocks together.

You can attach the yarn to the 2 blocks, then sl st into the Dc of a Dc Little Block, up to the juncture in between the Little Blocks.  Fig. 1.  Work your Sl St or Sc to connect the 2 blocks and Sl St up to the next juncture.
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FIG. 1
FIG. 3
FIG. 2
You can find detailed diagrams for more color designs inside
the upcoming book
Encyclopedia of Diagonal Magic &
Crazy Blocks
Beg: Beginning
 Ch: Chain stitch
Dc: Double Crochet   
Sc: Single Crochet  
Trc: Treble Crochet
Lp: Loop  
Hk: Hook
 Sk: skip stitches
Sl St: slip stitch
Yo: Yarn Over hook