About: This document specifies the Turtle Graphics language.

Any document using the Turtle Graphics language to describe a drawing should
use .tg at the end of its filename.

Introduction: The screen measures 1 by 1.

A a
Set angle to a degrees.

T t
Turn the turtle t degrees.

X x
Set position.x to x.

Y y
Set position.y to y.

F n
Walks forward n.

U
Pen up. IOW: Stops of drawing.

D
Pen down. IOW: Restarts to draw. Also draws that pixel where the pen is.

R n
Repeats n times the next lines untill E.

E
Ends a block started by R.

C c
Sets the color to c where c is an integer that fits in 8 bits.

# comment
Inserts the comment comment. Just the first comment is written in the PGM.

P p
Sets the step_length of F to p.

B
Prints debugging information to stdout.
