No real planning is required with a piece like this. I started with two hand-dyed (not by me) pieces. I had cut up one of them already and so had to stitch it back together.
The two rectangles are basted together using Jude Hill's glue stitch or invisible stitch. I am fond of this basting technique because it behaves like one piece of cloth and yet it is easy to separate when the design requires it.
Stitching on a park bench
I cut the top layer away and reveal color gradation beneath, using a hand-turned reverse-applique stitch. A lot of joy for so little work. zen.
the glue stitch from the back, invisible on the front.