Writing user scripts requires knowledge of JavaScript. The tutorials on the GreaseSpot Wiki should give you a running start on JavaScript both in general and as it relates to user scripts. Inspecting others' scripts can be helpful. You may be interested in Gönderilmiş scriptler için Greasy Fork'un kuralları and Script meta anahtarları Greasy Fork tarafından okundu. If you want help developing your script, feel free to forumda sor.
To post on Greasy Fork, you will need to create an account. From your kullanıcı sayfası, follow the link to yeni script gönder.