Now that you have your turtles moving, you are ready to learn how to change the shape, size and color of your turtles. Let's start by creating a new turtle shape. Select Tools -> Turtle Shapes Editor -> New. Create a new shape with the tools provided and give your shape a name, then select OK. You can also find many shapes to use by selecting Import from Library.
Setting the shape or any other attribute of a turtle is a turtle function. So try out the following code in the Command Center, substituting the name of your newly created shape where you see myshape. Remember crt is an observer command and the rest are turtle commands.
crt 1
set shape "myshape"
set color white
set size 3