Canvastic is a simple but very effective online service that gives you an online canvas and a pencil. The rest is done by you
You can choose different colors and pencil sizes and scroll the text with the text in the text box below.
It does not offer a way to scroll, but it records a video of the drawing process, so you can see how it is drawn.
After you finish your creation, you can download it or print it directly.
Summary, it's like a Windows Paint online. It's weird and it may be helpful to showcase the artist Yo's inside.