Programming turtle graphics
From JSXGraph Wiki
List of available commands
There is a predefined turtle object t. Therefore, all commands start with t, like t.fd(100);
- t.forward(len); or t.fd(len);
 - t.back(len); or t.bk(len);
 - t.right(angle); or t.rt(angle); ([math]\displaystyle{ 0\leq angle \leq 360 }[/math])
 - t.left(angle); or t.lt(angle);
 - t.penUp(); or t.pu();
 - t.penDown(); or t.pd();
 - t.clearScreen(); or t.cs();
 - t.clean();
 - t.setPos(x,y);
 - t.home();
 - t.hideTurtle(); or t.ht();
 - t.showTurtle(); or t.st();
 - t.setPenSize(size); (size: number)
 - t.setPenColor(col); (col: colorString, e.g. 'red' or '#ff0000')
 
Input
Output
Log window