Here it is, crochet tutorial part 2, or how to finish your tutorial to make it an actual afghan.
First, prepare your coordinating color.
To put all of your panels together (remember you should make 4 panels of 24 stitches across and 223 rows long, and one panel of 42 stitches across and 223 long) you'll put 2 of your panels with wrong sides (back side) together, and put your hook through the outside corner stitches of BOTH panels, and single crochet it, and continue until your get to the end and you have single crocheted your two panels together. As you might have guessed, you should put it together with the 24 stitch across panels on the outsides, and the 42 stitch panel in the middle.
When all of your panels are done and crocheted together, you'll single crochet around the whole afghan twice with your accent color, and then twice with your base color. You can add fringe on the short sides if you wish. There are several ways to do this, but what I have done in the past is taken 6 6-8 inch pieces of yarn, 3 of the base color and 3 of the accent. Put your hook through a loop, hook all 6 pieces of yarn, pull them through then pull the ends of them through the loop made with them, and pull tight.
If you do this you'll end up with a very warm blanket that is big enough for an adult.
That said, if you want to make one for a baby, you do the same stitches, but use baby yarn and an F hook (baby yarn is softer and thinner than regular yarn). You'll do 4 panels of 28 stitches across and 128 stitches long. To give you a visual, the one I've done ended up looking like this: