Okay, so I have completed the three "strips" of my Manos afghan and now I have to put it together. It's made up of 12 blocks and 4 different colours. I have to sew them together now and I'm not sure exactly how. I know I have to line all the pieces up some way and use the right colour of yarn to sew them, but which one? Each block is next to a different coloured block, which colour do I use? Also, which stitch would be the most invisible? Thanks!