How do i make my annoucement bar slide up or dissapear on scroll?

Any one got a quick solution for making annoucement bar dissapear when you start scrolling? so basicly making it not fixed

Can you share site url? We can check easier.

elevated.no - password: berman123

Add to Home > Design > Custom CSS

.header-announcement-bar-wrapper.dark {
    z-index: 999;
}
.header-announcement-bar-wrapper.dark.shrink {
    top: 0 !important;
    position: absolute;
}

Thank you it worked-  any way of making the transition happening almost instant ? - it kind of fades 

never mind i added transition: 0s; - it worked