HTML Anime | Make it more nice

Question

Any idea how I could edit my code to drop a shadow on panels without slow down the whole animation?

Here is my code:

https://code.sololearn.com/Wen965eIRDOU/?ref=app
(search Portal 2 in the code section)

Line 79 in the JS you can edit ? 0 : 60;
with a higher value at the 0 place.
Example 30.
I feel the result is much more realistic but the whole animation is slow down :(

Answer 1

I am sorry no one answered you since March and I'm quite sure it won't be of need answering now