I was able to implement my plan) thanks!
I added this code and this work good for me I'm glad!
let tl = gsap.timeline({
scrollTrigger: {
trigger: '#panels-container',
start: "+=100%",
scrub: 1,
end: "+=400%",
markers: true,
}
})
.to(".background", 1, {x: "-25%"}, '-=0.1')
.to(".background", 1, {x: "-50%"}, '+=0.6')
.to(".background", 1, {x: "-75%"});