It's entirely up to you Dave, but I think you may want to scale that down some. 

Where are you going to find a pin to make a 10 meter hole , that’s nuts 

But I found a page that tells you how to make a Pinhole Projector for such occasions.

http://www.exploratorium.edu/eclipse/how.html

I've been performing some experiments in the back yard, and I'm finding that imaging the sun projector-style through a tiny hole simply isn't bright enough, nor is the resulting image all that large (less than a half inch at six feet), so on to plan B, which is to take a small, weak magnifying glass and use it as the objective lens of the projector. The idea isn't to focus the light into a point, but to create an image of the sun that's the same diameter of the glass, which should (presumably) put the resulting image at best focus. The results are quite satisfying; the focal length has dropped from six feet to less than 2, and the image has increased from a half inch to two inches. It's a bright and clear enough image to see sunspots (at least I THINK that's what I'm seeing), so I'm happy with it. I just need to build the box to hold it, and contrive a way to aim the device. I may also ramp up the size of the magnifying glass in order to get a bigger, brighter picture.

I got the projector completed, and took some pictures of it:

Indeed, very impressive and tidy 

Well, it LOOKS pretty. As to how it's going to work? That remains to be seen. I expect a certain amount of blurring, since the sharpest image is also the one that will ignite the paper, but I'm hoping it will not be so blurry as to be useless. I really can't test that till the eclipse begins, and that's just exactly too late to do anything about it.

Yeah I used dark glasses and a piece of cardboard with a hole in it plus piece of paper.

Did you notice it all went quiet ?  All the birds stopped chirping.