.animation-container::before
{
clip-path
:
polygon
(0% 0%, 0% 100%, 100% 100%, 100% 0%, calc(100% - 10%) 0%, calc(100% - 10%) 10%, 10% 10%, 10% 0%);
transform
:
rotateX(-30deg)
translateZ(-10px)
;
animation
:
espelhar
2s
infinite
linear
;
}