Turtle Graphics is my RISC OS version of the very popular LOGO programming language as used on BBC machines in the eighty's. It is based on the Turtle program created by Acorn Computers Ltd. as an example program on the BBC Master 128 master floppy disc.
LOGO is a simple graphics-based language often used for teaching computer programming. However, LOGO is also a powerful language and can be used to simulate basic artifical intelligence systems (as demonstrated by a PC version of LOGO). My RISC OS LOGO does not support these extra commands and is designed for graphics use only.
LOGO consists of four main commands: FD, BK, RT and LT:
FD is used to draw a line foward. (e.g. FD 100 will move the turtle 100 units)
BK is the equivilent to FD only is moves backwards instead of foward.
RT moves the turtle to a certain angle. (e.g. RT 45 will move the turtle 45 degrees to the right)
LT is the same as RT but the turtle is moved left instead of right.
Full help within the application is supplied. Type 'HELP' to run the help program.
RISC OS 3.10
This program is FREEWARE which means that you may give a copy of it to
anyone as long as you do not make any profit from it. No matter what
you do with it though, you have to keep all files together and the
copyright message must be included, I retain the Copyright.