For instance, I made a triangle using the repeat code, but is there a way to fill in that triangle?
Another approach is to create art/shapes using the bodies of the turtles themselves, rather than just their pen drawings.
The turtle's body shape could be a triangle...
Agreed. Just make the turtle size bigger then you would have a triangle
The only way I have found to do this would be to change a line to a thicker size and then use it to fill in the shapes. I hope this helps.
That is what I did as well, I couldn't find any other way to do so.
The only way that I can think of filling something in is by setting specific patches to the color that you want if you picture if geometric this should work!