Press spacebar to add a point at the mouse pointer, drag them to adjust the curve. This method of creating a bezier curve is recursive, because you can add an infinite amount of points.
Please give credit to @Loev06 if you use this engine. - An explanation for bezier curves: https://www.youtube.com/watch?v=pnYccz1Ha34 - Formula I made in Scratch: https://en.wikipedia.org/wiki/B%C3%A9zier_curve#Terminology
