I am trying to animate various filters on an object at the same time, but I can't currently achieve this.

I have tried this:

filters += filter(type="motion_blur")
var/F1 = filters[filters.len]
filters += filter(type="wave")
var/F2 = filters[filters.len]

animate(F1, x=4, y=4, time=3, loop = -1)
animate(x=0, y=0, time=3, loop = -1)
animate(F2, x=2, y=2, time=3, loop = -1)
animate(x=0, y=0, time=3, loop = -1)

What do I need to change to make this work? It currently waits until the first animate is over to start F2 animation, while I'm actually trying to make them both get animated at the same time. I tried using flags = ANIMATION_PARALLEL, but in that case it gets worse as the second & fourth animation are never triggered the way I want.