Blog followers will know that recently I started to post the instructions for constructing this granny blanket (the ‘knackered granny blanket’!).
Part 1 covered the instructions for making the five granny squares you need to start off with. Hopefully by now you have your granny squares made and ready for joining. To join them together, you will need your turquoise blue yarn (if you are following the colour scheme pictured here).

Reminder: UK Crochet terms are used throughout. TB refers to a Treble Crochet in UK terminology (DC in US terminology).
Special Stitch: TB3tog. Yarn over hook (YOH), insert hook in space, YOH and pull up a loop, YOH and pull through first two stitches on hook only (2 loops on hook); yarn over hook (YOH), insert hook in space, YOH and pull up a loop, YOH and pull through first two stitches on hook only (3 loops on hook); yarn over hook (YOH), insert hook in space, YOH and pull up a loop, YOH and pull through first two stitches on hook only (4 loops on hook). Finally, YOH and pull yarn through all stitches on hook.
Instructions:
You are going to work along just two sides of your squares only initially, as shown in the picture at the top of this post.
Row 1:
Take your first square, join your turquoise yarn to a corner space, and chain 4. Next (chain 1 and 3TB) into each of the next seven chain spaces along, which should take you into the next corner space. Chain 2 and 3TB into that same corner space so that you are turning the corner. Then (chain 1 and 3TB) into the next SIX chain spaces. Chain 1.
Into the next space (which should be your next corner space), work a TB3tog, pick up your next square, select a corner to join into, and then also work a TB3tog into that space.
Next (chain 1 and 3TB) into each of the next seven chain spaces along, which should take you into the next corner space. Chain 2 and 3TB into that same corner space so that you are turning the corner. Then (chain 1 and 3TB) into the next SIX chain spaces. Chain 1. Into the next space (which should be your next corner space), work a TB3tog, pick up your next square, select a corner to join into, and then also work a TB3tog into that space.
Next (chain 1 and 3TB) into each of the next seven chain spaces along, which should take you into the next corner space. Chain 2 and 3TB into that same corner space so that you are turning the corner. Then (chain 1 and 3TB) into the next SIX chain spaces. Chain 1. Into the next space (which should be your next corner space), work a TB3tog, pick up your next square, select a corner to join into, and then also work a TB3tog into that space.
Next (chain 1 and 3TB) into each of the next seven chain spaces along, which should take you into the next corner space. Chain 2 and 3TB into that same corner space so that you are turning the corner. Then (chain 1 and 3TB) into the next SIX chain spaces. Chain 1. Into the next space (which should be your next corner space), work a TB3tog, pick up your next square, select a corner to join into, and then also work a TB3tog into that space.
Finally, (chain 1 and 3TB) into each of the next seven chain spaces along, which should take you into the next corner space. Chain 2 and 3TB into that same corner space so that you are turning the corner. Then (chain 1 and 3TB) into the next SEVEN chain spaces. Turn.
Row 2:
Chain 4. (3TB and chain 1) into the chain spaces in the row just completed until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SEVEN times. Chain 1 and TB into the Chain 3 at the start of the previous blue row. Turn.
Row 3:
Chain 4. (3TB and chain 1) into the chain spaces in the row just completed until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SEVEN times. Chain 1 and TB into the 3rd chain in the Chain 4 at the start of the previous row. Turn.
Row 4:
Chain 4. (3TB and chain 1) into the chain spaces in the row just completed until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SIX times, and then TB3tog twice into the next two chain spaces where the squares meet each other. Chain 1, and (3TB and chain 1) SIX times until you reach the first corner, where you will need to work (3TB, chain 2, 3TB) to turn that corner. Chain 1, and (3TB and chain 1) SEVEN times. Chain 1 and TB into the 3rd chain in the Chain 4 at the start of the previous row. Break yarn. Change to next colour of yarn in sequence.
You can now continue the blocks of four stripes until you have a series of stripes as illustrated below:

You can see in this picture I have already started to complete the stripes on the other side of the blanket, but you will only have one turquoise stripe in yours at this stage. Once you have got to this point, I will post the instructions on how to complete the other side of the blanket in Part 3.
If you get stuck, leave me a comment and I will be happy to help.