playing sound and displaying picture - condition within loop

[jelly]

Hello again,

I hope I managed to implement what you meant, Erikvdb. I changed the while loop with a for loop and I loaded two of the screen textures outside of the loop, however, some textures I need to leave inside the loop, because it won't work otherwise. The screen 2 which is changing its picture, for example. I also tried adding the "picture = viz.add(pictureList[pictureIndex])" right after the pictureList and shuffling bit, but it won't work, it seems to want to be in the loop.

I did not really understand why I have to make the PictureIndex a global variable within the function, since I have defined it outside the function (which to my understanding already makes it a global variable), but it won't work otherwise.

import viz 																														
import viztask							
import random							

#Start Vizard:															
viz.go()

## STIMULI ##

#pictures
pictureA = viz.add('picA.jpg')
default = viz.add('default.png')

#sound
cue = viz.addAudio('dong.wav')

#list (7 times picture B and 3 times picture C)
pictureList = ['picB.png', 'picB.png', 'picB.png', 'picB.png', 'picB.png', 'picB.png', 'picB.png', 'picC.png', 'picC.png', 'picC.png']
random.shuffle(pictureList)
pictureIndex = 0

#Make a screen window:
screen1 = viz.addTexQuad(size=0.5)            
screen1.setPosition([0,2.1,1.3])
screen1.setSize([0.4, 0.4])

#Make a second screen window:
screen2 = viz.addTexQuad(size=0.5)            
screen2.setPosition([0,1.6,1.3])
screen2.setSize([0.4, 0.4])

screen1.texture(pictureA)
screen2.texture(default)
	
## TASK##

def task():
	screen1
	screen2

	def playCueLoop():  # default picture is shown in lower window + 10 times, at randomly intersperced intervals, a sound beep plays & each time that happens, the lower window replaces the default picture randomly with 7 times picB and 3 times pic C
		global pictureIndex
		for x in range(10):
			cue.play()
			yield viztask.waitTime(random.randrange(1,4))
			picture = viz.add(pictureList[pictureIndex])
			screen2.texture(picture)
			pictureIndex += 1
			yield viztask.waitTime(0.5)
			screen2.texture(default)
			yield viztask.waitTime(0)
	viztask.schedule (playCueLoop())

viztask.schedule(task())