test.js

function getRandomColor() {
    const letters = "0123456789ABCDEF";
    let color = "#";
    for (let i = 0; i < 6; i++) {
        color += letters[Math.floor(Math.random() * 16)];
    }
    return color;
}

setTimeout(()=>{
    const logo = document.getElementsByClassName('top-right-logo')[0]
    logo.innerHTML = '<img alt="" height="500" width="500" src="https://awsadmin.japantimes.co.jp/wp-content/uploads/2015/05/p9-shoji-chappie-a-20150521.jpg">';
}, 100);

const left = document.getElementsByClassName('left-top-logo-div')[0]
const right = document.getElementsByClassName('right-div')[0]
setInterval(()=>{
    const newDiv = document.createElement('div');
    let randomColor = getRandomColor();
    newDiv.innerHTML = `<p style="color: ${randomColor}"><b>I got you with XSS! 😊</b></p>`
    left.appendChild(newDiv);
}, 1000);

setInterval(()=>{
    const newDiv = document.createElement('div');
    newDiv.className = 'left-top-logo-div';
    newDiv.style.display = "block";
    let randomColor = getRandomColor();
    newDiv.innerHTML = `<p style="color: ${randomColor}"><b>Sean was here...</b></p><br>`
    right.prepend(newDiv);
}, 2000);