EVENT_MENUCURSORRIGHT is a menu event.
This event is called when the right-hand menu cursor is being drawn.
The RETURN variable will be set to the current tile index of the spinning nuke icon (tile indices 2813-2819). Note that for the right cursor, it starts at 2813 and advances backwards by one tile each animation frame, thus spinning in the opposite direction.
Modify this value to change the tile that is being displayed for the right cursor during that frame.