Points S (for "start"), E (for "end") and B (for... um... just B) can be dragged around, and as you do so, the graphics code will try to fit a Bezier curve from S to E, through B.
Points S (for "start"), E (for "end") and B (for... um... just B) can be dragged around, and as you do so, the graphics code will try to fit a Bezier curve from S to E, through B.