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 Greasy Fork镜像's rules for posted scripts and Script meta keys read by Greasy Fork镜像. If you want help developing your script, feel free to ask in the forum.
To post on Greasy Fork镜像, you will need to create an account. From your user page, follow the link to post a new script.
