random walk in piazza environment

[maya]

hi,

I would like to generate a random walk actions for the avatar in the piazza environment. I want the avatar to walk around the environment by itself (without pressing any key) and to perform some actions when it sees a red sphere.

I have tried to write some code, but the avatar is moving around an oval. I am really stuck .. I don't know how to do it.

this is the code:

import viz
import viztask
import vizact
viz.go()

viz.add('ground.osgb')
avatar = viz.addAvatar('vcc_male2.cfg',pos=[0,0,9])
avatar.state(1)

walkLeft = vizact.walkTo([2.5,0,9])
walkRight = vizact.walkTo([-2.5,0,9])
walkActions = viz.cycle([walkLeft,walkRight])

waitSpaceBar = viztask.waitKeyDown(' ')
waitLeft = viztask.waitActionEnd(avatar,walkLeft)
waitRight = viztask.waitActionEnd(avatar,walkRight)
waitActions = viz.cycle([waitLeft,waitRight])

def walkAndStopTask():
	yield waitSpaceBar
	while True:
		condition = waitSpaceBar
		walkAction = walkActions.next()
		waitAction = waitActions.next()
		while condition == waitSpaceBar:
			avatar.runAction(walkAction)
			d = yield viztask.waitAny([waitSpaceBar,waitAction])
			condition = d.condition
			if condition == waitSpaceBar:
				avatar.clearActions()
				yield waitSpaceBar
			
viztask.schedule(walkAndStopTask())

your support is highly appreciated