How to set a CanvasPattern as the Color of animations

[563848086]

when I try to use a CanvasPattern object to set background color like this, it will not take effect, it will just turn to a white color:

animatedDataset.animations = {
backgroundColor: {
type: 'color',
duration: 1000,
easing: 'linear',
from: dataset.backgroundColor as Color,
to: 'white',
loop: true,
},