Click the Green Flag, and it will ask you, "What would you like to do? Draw a Cube, or a Pyramid?" If you want to draw a cube/rectangular prism, press C. If you would like to draw a Pyramid, press P. It will ask you a series of questions, then, it will create the shape based on your info! But, to make it even better, if somebody else creates a cube or pyramid, you will see it, too! Moderators, press M to clear all drawings.
THIS IS A TEST Wait... barely anyone will see this... hah!