Add a Turtle object and set its colors

If the value of the variable named turtle is equal to null

• Listing 5 instantiates a new Turtle object
• and adds it to the world near the lower-right corner
• facing due east (90 degrees).

The shell color is set to red and the body color (feet and head) is set to blue.

An example of the turtle with this color scheme is shown in Figure 3.