press "i" to show or hide instructions press space bar to turn on or off pen drawing press left and right arrows to turn left and right press up and down arrows to move forward and back press "c" to clear pen drawing
This is a sample project made for students participating in the #coderdojokc events. It demonstrates the use of pen drawing, a way to put instructions on the screen and have them go away, a way to drive a sprite around the screen using arrow keys. "Turtle graphics" (http://en.wikipedia.org/wiki/Turtle_graphics) refers to an object (such as a turtle) moving with commands that are relative to its own position, such as "move forward 10 spaces" and "turn left 90 degrees". The pen carried by the turtle can also be controlled, by enabling it, setting its color, or setting its width. A student could understand (and predict and reason about) the turtle's motion by imagining what they would do if they were the turtle. Seymour Papert called this "body syntonic" reasoning.
