Need help with my code!!!

Question

Hello! Basically I am trying to make a CSS anination with a box which moves around the corners in another box. I did the animation, I set everything up, but it seems thst it doesn't work... Can anybody help me?
Here is the code:
https://code.sololearn.com/WTbs9qxZ5Tub/#css'

Answer 1

I fixed that but it still doesn't work tho.

Answer 2

I fixed it again using JS this time. Everything works. I just have a little glitch, after I press replay and I press start, the speed increases, but Im really proud of it. :)

Answer 3

Syntax errors on keyframes, you forgot to enclose with right curly brackets...

Answer 4

*animation