Open ps first, then create a new "50*50px" file, fill it in black, then select all and copy.

Then create a new "50* 100px" file, paste the file made in step 1, as shown in the figure, and then execute "Edit-Define Pattern".

Then create a new "500* 1000px" file, create a new layer, and perform "Edit-Fill" to fill the pattern defined in the previous step, as shown in the figure:

Then execute "Filter-Blur-Gaussian Blur" with the value of 3 1, as shown in the figure, and then select all and copy.

Then create a new 500*500px file, paste the layer made in the previous step, and try to move up, but don't move to the bottom, as shown in the figure:

Copy the layer 1, then hold down the shift key and the Down key and press it twice, as shown:

Copy a layer, move it twice, repeat it three times, and * * * build five layers, as shown in the figure:

Select the top layer, select all, and execute Filter-Distortion-Polar Coordinate, as shown in the following figure:

Then repeat the above actions for the following four layers, as shown in the figure: (Repeat the polar coordinate "CTRL+F")

Then you can animate. The "window-animation axis" is shown in the figure below: