RUN IN TURBO MODE! (Hold shift while pressing the green flag to turn on turbo mode.) Type the first, second, and third X and Y positions in the prompt and watch the triangle be drawn and filled.
I needed to figure out how to fill in the triangles my 3D engine was drawing so this project was made to figure that out. I'm not the most happy with it, but it works for now so I'll improve It later on. If you have any Ideas on how to make it faster/more efficient then please leave a comment. Note: after making this I found a scratch project that does exactly what I was trying to do, but better. https://scratch.mit.edu/projects/219518662/