how i convert a ckeditor plugin

I'm trying to figure out how I can convert a ckeditor plugin to an external plugin.
eg
The simple plugin “about”.
I Rename the folder to about2

I put in the folder about2 the file plugin.js and an icon about2.png
The code of the file plugin.js is:

(function () {
    var about2Cmd = {
        exec: function (editor) {
            editor.openDialog('about2');
            return
        }
    };
    CKEDITOR.plugins.add('about2', {
        requires: ['dialog'],
        init: function (editor) {
            var commandName = 'about2';
            editor.addCommand(commandName, about2Cmd);
            editor.ui.addButton('About2', {
                label: "about2",
                command: commandName,
                icon: this.path + "about2.png"
            });
            CKEDITOR.dialog.add(commandName, CKEDITOR.getUrl(this.path + 'dialogs/images/.js'))
        }
    })
})();