Need to develop a set of animation to demonstrate motions, which are defined by a set of math equations. Variables in the equations could be the position of the object, moving speed, acceleration, and forces and so on. The animation will need to be posted as web so a group of users can play with it. The equations will need to be demonstrated on the screen too. When the user click start botton or move the object using mouse, the variables in the equation will change as the object moves.