Your writing captures a vivid and introspective moment of the protagonist observing the waves and the sand, and reflecting on the impermanence of life and the desire to wash away one's mistakes. It's a great start and showcases strong descriptive skills.
However, I would suggest making a few revisions to improve the clarity and flow of the piece. Here are a few suggestions:
• Consider breaking the piece up into paragraphs to make it easier to read and follow along with the different thoughts and observations.
• Vary the sentence structure and length to make the writing more dynamic and engaging.
• Provide a bit more context or background on the protagonist's thoughts and feelings. For example, what is she struggling with that makes her reflect on the idea of washing away mistakes? Adding a bit more depth to the character's motivations and emotions can help the reader connect with the piece on a deeper level.
• Consider using more active verbs and avoiding passive voice where possible. For example, instead of "She watched fascinated by the way the waves took away all the mistakes", try "She fascinatedly watched as the waves carried away all the mistakes".
Overall, the piece shows a lot of potential and could be even stronger with a few tweaks to the writing.