Beep, or flash the screen.
Also, unless an argument is given,
terminate any keyboard macro currently executing.

Return non-nil if the frame and buffer state appears to have changed.
VARIABLE is a variable name whose value is either nil or a state vector
that will be updated to contain all frames and buffers,
aside from buffers whose names start with space,
along with the buffers' read-only and modified flags.  This allows a fast
check to see whether buffer menus might need to be recomputed.
If this function returns non-nil, it updates the internal vector to reflect
the current state.

If VARIABLE is nil, an internal variable is used.  Users should not
pass nil for VARIABLE.

Set the cursor-visibility flag of WINDOW to SHOW.
WINDOW nil means use the selected window.  SHOW non-nil means
show a cursor in WINDOW in the next redisplay.  SHOW nil means
don't show a cursor.

Value is non-nil if next redisplay will display a cursor in WINDOW.
WINDOW nil or omitted means report on the selected window.

Value is last nonminibuffer frame.

Start writing all terminal output to FILE as well as the terminal.
FILE = nil means just close any termscript file currently open.

Perform redisplay.
Optional arg FORCE, if non-nil, prevents redisplay from being
preempted by arriving input, even if `redisplay-dont-pause' is nil.
If `redisplay-dont-pause' is non-nil (the default), redisplay is never
preempted by arriving input, so FORCE does nothing.

Return t if redisplay was performed, nil if redisplay was preempted
immediately by pending input.

Clear and redisplay all visible frames.

Clear frame FRAME and output again what is supposed to appear on it.

Send STRING to the terminal without alteration.
Control characters in STRING will have terminal-dependent effects.

Optional parameter TERMINAL specifies the tty terminal device to use.
It may be a terminal object, a frame, or nil for the terminal used by
the currently selected frame.  In batch mode, STRING is sent to stdout
when TERMINAL is nil.

Pause, without updating display, for SECONDS seconds.
SECONDS may be a floating-point value, meaning that you can wait for a
fraction of a second.  Optional second arg MILLISECONDS specifies an
additional wait period, in milliseconds; this may be useful if your
Emacs was built without floating point support.
(Not all operating systems support waiting for a fraction of a second.)