[PD] Using the keyboard to control motion of pdp_form (for a drawing machine)

[joao dos santos]

Hello,
I'm new to this list and I'm looking for some help regarding the control of
the motion of an ellipse using a keyboard - 2 keys for x axis and 2 keys
for y axis.
When drawing using pdp_pen on a x11 window the keyboard doesn't act upon
the pd patch.
How can I control the ellipse motion using the keyboard?
Can anyone help me with this?

Thanks,
João
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