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Program : MiniLOGO
Purpose : One-line Implementation of LOGO Turtle Graphics
Author : (C) Jon Ripley, 1999-2001
Version : 0.09 (25th August 2001)
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Commands:
F <distance> Move turtle forwards <distance>
B <distance> Move turtle backwards <distance>
L <angle> Turn turtle left <angle> degrees
R <angle> Turn turtle right <angle> degrees
H Home turtle (move to centre of screen)
P Toggle Pen Up / Pen Down
C Clear screen and home turtle; rest of line is ignored
X Exit MiniLOGO
*<command> Do *<command>
: <comment> Short comment; can be included in compound statements
| <comment> Long comment; rest of line is ignored
; Command separator
<iterations> Repeat command, must be first command in a line
Commands can be upper or lower case. No spaces are required in commands but can
be used anywhere except immediately before a command. Invalid commands have no
effect. Numbers must be in decimal.
Multiple commands on one line can be separated with ';', eg.
f100;r90;f100;r90;f100;r90;f100; The terminating ';' is not required.
Repeat is enabled by prefixing a line with the number of repeats followed by
';', eg. 4;f100;r90;
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