What is a software which can draw by just typing?

Question

About twenty years ago, I came into contact with a software which can draw (e.g. a line) by typing on it (e.g. typing some code, then push "ENTER" (I am not sure about this part), a line will appear on the screen). I think there was no way to choose the color of the drawn line.

Now I want to look at this software again, but I did not remember the software name. Do anyone on this site have any idea what this software is?

To rephrase, I am asking for a software that draw (e.g. a possibly one-colored line) by typing on it (e.g. typing some code, then push "ENTER" (I am not sure about this part), a line will appear on the screen).

PS. Please inform me if the you think that this is not an appropriate question to ask here.

Answer 1

This sounds like the Logo programming language.

The simple Logo drawing commands move the "turtle" (drawing pen) forward and backward and turn it right or left. The commands and their abbreviations are given below:

fd forward 
bk backward 
rt right 
lt left 
cs clearscreen

The commands

     fd 60 rt 120 fd 60 rt 120 fd 60 rt 120 

cause the turtle to draw a triangle, as you can see by trying them out - there is a free Logo in the browser site at http://logo.twentygototen.org/