Static Landing/Front page with image BEFORE normal home page?

Hi there! You folks have all been so helpful before, I thought I would run this by you. I LOVE the spun layout, and am super happy with my site. But, I would like to make an ‘enter’ page… so that when you go to my URL, the first thing that comes up is a fairly basic page with some text and an image, with an ‘enter’ button, which would then take you to what is currently my website. Does that make any sense? How would I do this?
For reference, my url is http://www.threeoaksvb.com
Thanks so much!