Turtle graphics

Turtle graphics are a simple way to draw graphics as well as a way to teach programming.

Grammar

These are the available commands to control the pointer:

F: Forward: Draw a line one step into direction
L: Leaf: Draw a line one step and return to previous location (same as F++M++)
M: Move one step into direction (without drawing)
D: Draw a dot
+: Turn left (counter-clockwise) by angle
-: Turn right (clockwise) by angle
[: Save current position and direction
]: Restore last saved position and direction

Options

Iterations

Turn angle In degree.

Step size In percent of canvas.

Draw speed In milliseconds.

Line width In pixel.

Start position

X (left)

Y (top)

In percent of canvas; leave empty to start at center.