PenDown                  Enables Drawing for Turtle

 PenDown;                                                             [TG/TP]

    Lets the turtle draw. Any movements made after PenDown cause the
    turtle to "drag" its pen behind it, drawing pictures.

           Note:    PenDown is the initial status of the pen.

  -------------------------------- Example ---------------------------------

           PenUp;                   { pick up pen }
           Forwd(50);               { move to new location }
           PenDown;                 { put pen down }
           Back(50);                { and draw a line }