Judy, thats pretty! I'm not using black though, so wouldn't work for me on this one.
As far as the pieces moving when you applique...believe me...I had that problem!! I've used a basting stick to actually glue them down before, but now I think I've worked out a method that works for me. I draw the outline on the background fabric and then I draw the outline on each piece too. I stick a pin through a sharp point on the applique piece, then match the piece to the background marking and poke the pin STRAIGHT down. I do this in several places on the applique piece to insure that it is exactly in the right spot. Then and only then do I pin the piece to the background. After it is securely pinned down, pull the staight up and down pins out. I'm still not perfect, but I'm getting better with each block.