Toggles screen mirroring to the airplay device named "Bedroom"

screen_mirror.applescript

tell application "System Preferences"
    quit
end tell
tell application "System Preferences"
  activate
  set the current pane to pane id "com.apple.preference.displays"
  tell application "System Events"
    delay 1
    set window_name to name of first window of (first application process whose frontmost is true)
    get window_name
    tell pop up button 1 of window window_name of application process "System Preferences"
    delay 0.5
      set current_display to value
       click
       delay 0.5
       if current_display = "Off" then
         click menu item "Bedroom" of menu 1
         delay 10
       else
         click menu item "Off" of menu 1
         delay 5
       end if
    end tell
  end tell
end tell
tell application "System Preferences"
  quit
end tell