Close Tweetbot Windows.applescript

tell application "System Events"
    tell process "Tweetbot"
        repeat
            -- need to put this in a try block as it sometimes fails
            try
                -- loop over all of the windows
                repeat with _window in windows
                    -- if the title isn't "Main Window"...
                    if title of _window is not "Main Window" then
                        -- ... close it by performing AXPress on button 1 (which corresponds to the red stoplight button)
                        tell _window
                            tell button 1 to perform action "AXPress"
                        end tell
                    end if
                end repeat
            end try

            if (count of windows) is 1 then exit repeat
        end repeat
    end tell
end tell

beep