simpleDemo = {
let demo =svg.querySelectorAll('.demo')
gsap.set(demo, {opacity: 0})
const anim = gsap.timeline({paused:true})
.to(demo, {opacity:1, stagger:1})
const play = document.querySelector("#playDemo");
const restart = document.querySelector("#restartDemo");
play.onclick = () => anim.play();
restart.onclick = () => anim.restart()
}