Foucault's pendulum

http://en.wikipedia.org/wiki/File:Foucault-rotz.gif

"Animation of a Foucault pendulum at the Pantheon in Paris (48°52'
North), with the earth's rotation rate greatly exaggerated. The green
trace shows the path of the pendulum bob over the ground (a rotating
reference frame), while the blue trace shows the path in a frame of
reference rotating with the plane of the pendulum."

http://en.wikipedia.org/wiki/Foucault_pendulum

That explanation is entirely in error even though the graphics are
correct, so it would seem,even in the absence of any values ignoring
the latitude variation and just working with the daily rotation of the
Earth and a freely swinging pendulum,there is still a better
explanation to be had.

Anyone wish to take a crack at putting the graphics in proper
perspective ?.