Code

sprite = Sprite('Ball')
pose = Posenet()

pose.video("on", 0)
pose.enablebox()

while True:
  pose.analysestage()
  
  if (pose.isdetected(0, 1)):
    sprite.setx(pose.x(0, 1))
    sprite.sety(pose.y(0, 1))
    sprite.show()
  
  else:
    sprite.hide()

Output