What you're talking about is a sketch, which is totally fine. What this website produces is a thing that is very clearly a facsimile of a plot. It literally has

What you're talking about is a sketch, which is totally fine. What this website produces is a thing that is very clearly a facsimile of a plot. It literally has made an attempt to produce points of different sizes etc, to look like a bubble plot but it's not. It's just made up.