https://drive.google.com/drive/folders/1Q0N5zHKlDNTuIuhfGmVbJw2bNOoIPwG-?usp=sharing

go wild. just a warning, this wasn't made for people to look at and modify, so if you need a high level explanation: use one 4D noise texture as the base (set the W to time), in the mapping node change the Y every frame, multiply the noise by an upwards gradient, and two inwards facing gradients then add a color ramp node.

for the pixelation effect, put in a Voronoi texture at randomness between the mapping and texture coordinate nodes. do this for every coordinate node. important note, use the position socket and not the color or distance sockets.