VPython clear drawing

I have been searching the VPython documentation, and have not been
able to find a method to clear drawings.

For example, if I were to draw the arrow from the documentation
(http://vpython.org/contents/docs/visual/arrow.html), is it possible
for me to clear the drawing and plot another arrow at another
coordinate?  Currently, I have been only able to plot arrows on-top of
each other.

If not, is there a visual.pointer(clear) or visual.pointer(clear)?

Thanks,
John

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