Navigation on page

 let h1=document.querySelector("h1");

console.log(h1.parentElement);

let box=document.querySelector(".box");

console.log(box.children);

let ul=document.querySelector("ul");

console.log(ul.children);

console.log(ul.previousElementSibling);

console.log(ul.nextElementSibling);

let img=document.querySelector("img");

console.log(img.previousElementSibling);

console.log(img.previousElementSibling.style);

img.previousElementSibling.style.color="green";