Save it as a Snippet. The CSS stays in your <head> or external style sheet, so you won't need to copy that part repeatedly. Open the Snippet tab, highlight the code from <div class=" text_over_image"> to it's ending </div> (leave out <body> and any other html that you don't want repeated) and then click the New Snippet button it's the second from left on bottom of Snippet Tab. Now, whenever you want to use that code, you can just click where you want the code, then click your new snippet in the Snippet Tab.
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