zLineSlider.py

from pygeo import *

v=display(scale=7)

zp1=zPoint(1,3,color=WHITE)
zp2=zFreePoint(-1,-2,color=WHITE)

zline=zLine(zp1,zp2,color=BLUE)
zLineSlider(zline,color=RED,pointsize=.15)

v.pickloop()