The ImageSequence.Iterator() function takes an image sequence as an argument and returns an iterator object that can be used to loop over all frames in the image sequence. The [] operator can also be used to access a specific frame number.
```python
iterator = ImageSequence.Iterator(image)
frame = iterator[index]
```

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Pillow includes support for image sequences, otherwise known as animated formats, such as GIF. Animated formats can be opened using the usual open() function, which will automatically load the first frame of the animation.
The seek() function allows for loading the other frames of the animation. The argument of seek() is the number of frames to skip ahead.
```python
image = Image.open("animation.gif")
image.seek(frame)
```
The tell() function returns the current frame number.
```python
image = Image.open("animation.gif")
image.tell()
```

Image Sequences (Pillow)

https://pillow.readthedocs.io/en/stable/index.html

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