The avatars that comes with Vizard don't contain any blinking animations or morph targets. If you created your own avatar using 3dsmax then you could add a blink morph to the avatar and control this within your script. Here is some sample code that shows how to make an avatar blink using a morph target:
Code:
avatar = viz.add('avatar.cfg')
#Blink morph ID of avatar
BLINK_MORPH = 1
#Action that will animate blink closing
close_eye = vizact.morph(BLINK_MORPH,1,0.1)
#Action that will animate blink opening
open_eye = vizact.morph(BLINK_MORPH,0,0.1)
#Action that will wait 1-5 seconds
wait_blink = vizact.waittime(vizact.randfloat(1,5))
#Action that will blink indefinitely
blinkAction = vizact.sequence( wait_blink, close_eye, open_eye, viz.FOREVER )
#Add blink action to avatar
avatar.addAction(blinkAction)