Your drawing is so detailed and elaborate guys, you have obviously put lots of hard work into this! You have come up with a really original idea, this would be great for students I think, all that writing would create lots of renewable energy! I really like that the ink is erasable too, this is a handy additional feature. Well done for including the pictures for each step of harnessing the energy, this really completes your invention and shows how it could be used to create green energy! Great thinking guys, keep inventing!