Oh wow, I remember this application. We had it at school and it connected to a little robot called "Romer" or something. The commands you issued to make the turtle (?) move around were reflected by Romer. Romer held a pen and responded to the pen up and pen down commands. We set it up in the classroom with an enormous sheet of paper and used it to draw pictures. I think that was on a BBC. A couple of years later I got Amiga Logo and got my first taste of programming.
Wow, that must have been 15 years ago!
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moto