Negative Positive Quilts

I just completed these small negative positive quilts.
The quilting done with a zigzag stitch was an accidental discovery I made. My grandchildren were creating fused quilts faster than I could quilt them for them. I put Jessica’s under the needle and started quilting. It didn’t take me long to realize the machine was not doing a straight stitch. I decided it really was a great idea and have used it on everyone since.
I have framed them. I have not figured out now to take photos of something behind glass in a frame.
In fact, these images were scanned so they are much better than any photos I DO take.
Can YOU see the pattern I created?