TMUXセッションに通知を送信する

manページから

display-message [-aINpv] [-c target-client] [-d delay] [-t target-pane] [message]
            (alias: display)

        Display a message.  If -p is given, the output is printed to stdout,
        otherwise it is displayed in the target-client status line for up to

        delay milliseconds.  If delay is not given, the message-time option is
        used; a delay of zero waits for a key press.  ‘N’ ignores key presses
        and closes only after the delay expires.  The format of message is
        described in the FORMATS section;

        information is taken from target-pane if -t is given, otherwise the
        active pane.

        -v prints verbose logging as the format is parsed and -a lists the
        format variables and their values.

        -I forwards any input read from stdin to the empty pane given by
        target-pane.

通知器

cmatrix -t 5 && tmux display-message done