Thanks for the fast reply!
Sorry that my explaination wasn't good. I try to explain the scrollanimation. I have 3 elements, a,b and c. Element a is moving in x direction. When it reaches 50% of the way, element b should rotate, during element a is moving. Without a pause or something like this. After elemnt a reaches its ending position, element c will change its color. I have made it a scrub animation, so delay don't work.
Here is a codepen with a simple example what I did: