HOME moves the turtle to the center or origin of the drawing window.
Sets the turtle heading to 0 - makes it point to the top of the screen. TO signals to the turtle that you are going to teach it a new procedure. END ends a list of commands in a procedure. Believe it or not, we can do a great many things with the set of commands listed above. Before you do that, think about the the homework problems at the end of Lesson 2.