I have my website up and running with graphene. Most functionalities and technical adaptations have been made to wish (thanks to much help from the forum!). Now I want to fucus on the look of the site. I made a visual mock up of how I want to create which is pretty different from today's.
How can I prepare for this change (including experimenting without disturbing the side before I cab switch over? How can i prevent to have to build a separate wordpress site and then after finalising the new look have to port it over to the original site?