Q.Ground Cover
Want a ground cover that looks like pebbles. (Saw it on tv)

Certified GKH Gardening Expert
Could it have been pebbles? The only living plant that I can think of that looks like rocks are lithops, and they are typically grown in a rock garden or container, not over a large area. I've included some other groundcovers as well.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/lithop/growing-living-stone-plants.htm
https://www.gardeningknowhow.com/ornamental/groundcover/gcgen/groundcover-for-foot-traffic.htm