What Bézier curve is?

A Bézier curve is a parametric curve frequently used in computer graphics and related fields. Generalizations of Bézier curves to higher dimensions are called Bézier surfaces, of which the Bézier triangle is a special case. Bézier curve can be used to specify the velocity over time of an object such as an icon moving from A to B, rather than simply moving at a fixed number of pixels per step. This also applies to robotics where the motion of a welding arm, for example, should be smooth to avoid unnecessary wear. Pierre Bézier used them to design automobile bodies at Renault.
Scroll down to draw your own Bezier curve.
Instruction: Click onto the gradient to choose the color. Then pressing and holding down the left mouse button draw the line inside a canvas. To draw->

Bezier Curves