SLEEP Statement Details
 
Syntax
  SLEEP [seconds]
 
The optional argument seconds determines the number of seconds the
program is suspended.
 
The SLEEP statement suspends the program until one of the following
events occurs:
  - The time period in the seconds argument has elapsed.
  - A key is pressed.
  - An enabled event occurs.
 
If seconds is zero, or not specified, the program is suspended
indefinitely. Only a keystroke or an enabled event can interrupt an
indefinite suspension.
 
SLEEP responds only to keystrokes that occur after it executes.
SLEEP ignores characters in the keyboard buffer that were typed before
it executed.
 
An event (such as ON COM or ON TIMER) cannot interrupt a SLEEP
suspension unless its trapping is active when the event occurs. This
means that trapping must have been initialized with an ON event
statement, turned on with an event ON statement, and not have been
disabled with an event OFF statement or an event STOP statement.