The first picture shows the pieces that I am working on, on the left
Starter scraps in the middle
Some other blocks I have cut and stacked that I keep beside my machine
The second picture shows that I have sewn onto my starter scrap and I have butted my first block right up close to it,( I like to leave about a 1/8" to a 1/4" gap between them) and I will start sewing on it. I use these scraps over and over again, I keep several to the side of my machine.
The third picture shows that as soon as I come to the end of the first block, I have placed the second block right up to my presser foot and will start sewing on it leaving a small gap.
It doesn't matter whether your blocks are square, triangles, circles, or a combination of these... you can chain piece like this with most all of them :D:D:D
Your beginning and ending seams won't get sucked down into the needle hole, you save on thread (you don't have long thread tails to trim off of the beginning and ending seams) and it is a real time saver too :wink: