Here is my version of crazy quilting.
This is a great way to use up scraps or leftovers from other projects.
first gather up lots of differant colors of scraps. I don't like to repeat any color but that is up to you.
Place two scraps face to face and sew together. You can sew along a straight edge or you can angle the seam across the fabrics. The more angles you use the more interesting your finished piece.
Open and iron the seam open. You can iron to the side but if you open the seams you will have less bulk.
Trim the fabric 1/4" from the seam.
When you audition a new piece to add lay it face down on your joined swatches and fold it back so you can make sure it fits and will be where you want it to be. This takes a little practice to see where things will go before you add them. Make sure the added swatch is face down not face up.
The nice thing about this method is I rarely rip a seam. If I did something that was wrong or didn't suit me I just cut off the seam and start over.
OK now add a third swatch to the first two. Iron the seam open and iron the front so everything lays flat. Makes it easier to add more swatches.