Five years ago, I moved to a small town by the sea. I had never lived near the ocean before, but I had always longed for it, especially imagining how refreshing it would be to wake up early in the morning and run on the beach.   However, when I actually went to the beach in the morning, I found that it was not always ideal for running, especially after bad weather, as trash would often be scattered all over.   That's when I started beach cleaning, but I soon grew exhausted from the seemingly endless task. This led me to the idea of using robots, which are adept at repetitive tasks, to clean the beaches.   There are already some machines designed for beach cleaning. However, these tend to be large and heavy machinery, not suitable for use on every type of shoreline.   In particular, using heavy machinery on beaches inhabited by wildlife could harm the animals and even destroy their habitats. Moreover, there are many beaches around the world where not even humans can go to clean, let alone heavy machinery. To clean these shores, we need smart, comparatively small robots.