MARK   MarkName
 GOTO   MarkName
 ===============================================================

 This is a simple way to jump around inside an Event's commands.
 You don't really need this command, since it may be confusing.

 When you declare MARK, you are just marking a point in the program.
 No action is taken when the command is encountered.

 GOTO goes to the MARK which bears the same MarkName as itself.

 You can not jump to a Mark of a different Event.
 Also you may confuse Gui4Cli if you jump in and out of while loops
 of other such constructs..