напиши письмо на английском про мой любимый спорт

Sure! Here's a simple and friendly letter in English about your favorite sport:

Dear Friend,

I hope you are doing well. I wanted to tell you about my favorite sport. It is basketball. I love playing basketball because it is very fun and exciting. When I play, I feel energetic and happy. I enjoy running, jumping, and trying to score points with my team.

Basketball also helps me stay healthy and active. I like watching basketball games on TV too. My favorite team is [insert team name], and I always cheer for them. Playing and watching basketball makes me feel happy and motivated.

I would love to hear about your favorite sport too. Let me know what you enjoy doing in your free time.

Take care and see you soon!

Best wishes,
[Your Name]

If you'd like, I can customize it further or make it more formal or informal.