Make the main window scroll horizontally and...

I have the following css in a website. What im trying to do is make the secondDiv grow as much as it like and make the main window scroll horizontally, to push the window to the right and not start second div on a new line. SecondDiv should start to the left of first div and make the window scroll horizontally when x repeatingDiv fills the secondDiv.

Does anyone have any idea of how to accomplish this?

Help will be greatly appreciated!

   <div class="firstDiv"></div>
 
    <div class="secondDiv">
 
	<div class="repeatingDiv"></div>
	<div class="repeatingDiv"></div>
	<div class="repeatingDiv"></div>
	<div class="repeatingDiv"></div>
 
    </div>