Learn computer programming while having a jolly time
Move the Turtle with commands that are relative to its own position, e.g., "move forward 100 pixels" or "turn right 30 degrees". From these building blocks you can build more complex shapes like circles, fractals, etc. Combined with R control flow, functions, and recursion, the idea of Turtle graphics allows students to get familiar with computer programming in a very accessible and pleasant way.
Other TurtleGraphics: turtle_do,
turtle_getpos, turtle_goto,
turtle_init, turtle_move,
turtle_param, turtle_reset,
turtle_show, turtle_status,
turtle_turn, turtle_up