This is my 150th project, by the way. Click in the white area and a block will appear. It obeys gravity, so it will wove down until it hits black. Click on a block to delete it. The second sprite is the gravity sensor; I would have made it one sprite but it would have been horribly slow. In version 2, you can change the gravities of the blocks. When making a block, press one of the arrow keys or the space bar, then click where you want the block to make that block go in that direction, with the space bar being no gravity. To change an existing block's gravity, press one of the arrow keys or space and click on the block you want to change the gravity on. No key pressed when making a block will result in a downward gravity. No key pressed when clicking an existing block will still delete it. If you have any questions, feel free to ask!