This java applet try to animate a 2D simple harmonic motion (SHM)
It is similar to another SHM java applet at our Virtual Physics Laboratory Equation for the trajectories are
$x(t)=X_0 cos(\omega\, t)$
$y(t)=Y_0 sin(\omega\, t)$
where $X_0,Y_0$ are amplitude in X and Y direction, $\omega$ is the angular frequencity
It becomes a circular when X/Y amplitude are the same.
    Parameteres that you can modify:
  1. Amplituide in X/Y direction
  2. Angular frequency of the oscillation
  3. Hope you enjoy it!