A simple pattern design made with stripes of alternate color can provide an interesting perceptual reversal effect if we distribute onto them two sets of circular elements as depicted below. Instead of black and gray you can obviously use complementary colors such as red and blue to enhance the contrast of the components of the pattern.
With a little imaginativeness you can make the final pattern design look like a circuit board. Now, can you say after the picture if the background of the circuit board is black or gray? The colors of the background oscillate between ‘figure’ (circular elements) and ‘ground’ according to where you look first. This fluctuation effect may occur even without conscious effort.
We can also adapt this visual effect on a series of concentric rings, as shown below.
The number of rings of the pattern and the complexity of the arrangement of circular elements has no limits and depends only on your imagination.
I used these simple designs to make eye-catching monochrome T-shirts and merchandise…