I want to solve conflicting interests for the roof of the gojo-bet style ferret pen: to shade the ferrets and to give sun to the plants. Got ideas? THE FIRST CHALLENGE: My idea's below, but do you have a better one? THE SECOND CHALLENGE: My idea -- but how to achieve it? To have a roof that I can pull up when it isn't too sunny, and lower when it is. And, if possible, to be able to raise and lower parts of it at different times of day, depending on sun direction. I'm thinking that there would be only two or tree parts to raise separately, each consisting of a few or several triangles. The roof is pointed and round, consisting of a series of triangles slanting down around the peak, which is the end of the center pole of the structure. There are two photos at this link. One shows the pen's skeleton from the side. The other looks up through the roof structure. http://www.facebook.com/profile.php?id=100003349690769 THE THIRD CHALLENGE: I plan to make the roof of cloth or plastic. The prototype will be of a woven propelyne plastic that's light, inexpensive, colorful, AND BEAUTIFUL, but disintegrates in a few months due to sun action. If I could solve the disintegration problem, I'd always use the woven plastic. Got ideas? [Posted in FML 7387]