About Lua Frame Setting

There is a frame named f in my addon. The addon is working for World of Warcraft. With the help of a slash command, I want to make the frame named "f" visible until the next successful spell cast. Only if command used; If the player is in a gcd, the "f" frame should be visible 0.5 seconds before the end of the active gcd when the command is used. (it shouldn't matter when the command is used) If the player is not in a gcd, the "f" frame should be instantly visible when the command is used. Purpose: - The purpose of the Lua frame setting is to add functionality to a Lua frame. Requirements: - I have a clear list of requirements that need to be implemented. Ideal Skills and Experience: - Intermediate level of familiarity with Lua. - Experience in customizing the appearance of a Lua frame. - Strong understanding of Lua scripting and its performance optimization. Please provide examples of your previous work related to Lua frame setting.