I want to refresh all windows & panes in a Tmux session. Stumped.

refresh_Tmux_windows

# ~/Documents/ayadn_shell.sh
# 
# I want to refresh all windows & panes running in the currently-running Tmux session.
# I'm not Linux- or Tmux- literate (2 weeks in.)
# 
# Menu option (item 8, not implemented) in the partial code below doesn't work.
# I intended this code to close Tmux and then re-open it - mirroring the manual method I use currently.
# 
# "Tmux kill-session" exits to the command line
# "mux ayadn" starts Tmuxinator and sets up a Tmux session using ~/.tmuxinator/ayadn.yml
# All that happens is Tmux exits.

choice=
until [ "$choice" = "0" ];
  do
    echo ""
    echo "AYADN MENU"
    echo ""
    echo "8 - Refresh session"
    echo ""
    echo "0 - Exit session"
    echo ""
    echo -n "Enter Selection:"
    read choice
    echo ""
    case $choice
      in
        8 ) tmux kill-session
            mux ayadn;;
        0 ) tmux kill-session
            exit;;
        * ) echo "Please enter 8 or 0."
     esac
     echo ""
  done

Code snippet superseded by my Linux life story!