Basic Movement

- turtle drawing

simple

Primitive Alt Action
Forward nn
Back nn 		FD
BK 		Move turtle forward nn steps .
Move turtle back nn steps.
Right nn
Left nn 		RT
LT 		Right Turn. Turn turtle right (clockwise) nn degrees.
Left Turn. Turn turtle left (counter-clockwise) nn degrees.
PenUp
PenDown 		PU
PD 		Raise turtle pen , (no drawing as turtle moves).
Lower turtle pen , (draw a line as turtle moves).
HideTurtle
ShowTurtle 		HT
ST 		Hide the turtle (make invisible).
Show the turtle (make visible).
ClearScreen CS Clear the screen , and reset turtle to home position.

Note

  1. The command PenDown PenUp doesn't draw a dot. A mechanical turtle would do so but in Logo programs this would create many unwanted dots. To create a dot (in the pen shape and width), use PenDown Forward 0 PenUp . Or Dot Position for a single pixel 'dot'.
  2. Be careful using the ClearScreen command in programs. It clears the screen and pen colors to the users personal preferences. This may make your program work differently on another machine. Best to use SetSC and SetPC instead.