Generating abstract images for Vuforia

Looking for some guidance on creating some abstract images with random shapes and colors to be used with Vuforia.

Ideally, I would like to create an image with some random shapes such as squares, triangles, and any other shapes with distinct edges. Circles should be avoided as they have no edges or features that can be tracked as per Vuforia guidelines It would be great if it can be specified that the shapes have clear border outlines around them. And I would like to be able to fill the shapes with either random colors or color gradients of a few specified colors.

Essentially the goal is to have some images with random shapes and colors with no visible patterns to meet the recommendations for image targets from Vuforia as per this page. https://library.vuforia.com/content/vuforia-library/en/features/images/image-targets/best-practices-for-designing-and-developing-image-based-targets.html

Here is an example of an image I found. https://cece.uco.edu/idea/manuals/XR/AR/VuforiaAR/images/Marker-01.png

Its not an ideal image to what I am looking for as I would like the shapes to be a bit smaller so the overall image can be smaller.

I don't have much experience with image generation / manipulation in any programming language.

Anybody generated any images programmatically?