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HTML

CSS

@import url('https://fonts.googleapis.com/css2?family=Nerko+One&display=swap');
:root {
	--primary: #FABC3F;
}
* {
	padding: 0;
	margin: 0;
	box-sizing: border-box;
}
body {
	height: 100vh;
	display: flex;
	text-align:center;
	flex-direction: column;
	gap: 40px;
	align-items: center;
	justify-content: center;
	background: radial-gradient(at center, #A04747, #000);
	color: #fafafa;
	font-family: "Nerko One", cursive;
  	font-weight: 400;
 	font-style: normal;
	font-size: 16px;
}
.title {
	font-size: 3.5rem;
}
h2 {
	font-size: 2rem;
}
b {
	color: var(--primary);
}

main {
	position: relative;
}
#getReady {
	opacity: 1;
}
#ctr-arm {
	display: flex;
	gap: 16px;
	margin: 16px 0;
}
#ctr-arm span {
	background-size: contain;
	background-position: center;
	width: 150px;
	height: 150px;
	cursor: pointer;
}
#ctr-arm span:hover {
	transform: scale(1.1);
}
.active {
	filter: drop-shadow(0px 0px 15px var(--primary));
	transform: scale(1.1);
}
#rock {
	background-image: url('https://images.vexels.com/content/145641/preview/earth-stone-illustration-8dd583.png');
}
#paper {
	background-image: url('https://cdn-icons-png.freepik.com/512/2541/2541988.png');
}
#scissor {
	background-image: url('https://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Gtk-cut.svg/1024px-Gtk-cut.svg.png');
}
#btn-start, #btn-reset {
	font-family: "Nerko One", cursive;
	font-size: 1.8rem;
	background: var(--primary);
	color: #fafafa;
	border: none;
	outline: none;
	cursor: pointer;
	padding: 6px 30px;
	border-radius: 25px;
}
#btn-start:hover, #btn-reset:hover {
	transform: scale(1.2);
	box-shadow: 4px 4px 10px rgba(0, 0, 0, .2);
}

#pvp {
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	align-items: center;
	justify-content: center;
	display: none;
}
#pvp span {
	width: 100%;
	aspect-ratio: 1/1;
	background-size:contain;
	background-position:center;
}
#pvp p {
	font-size: 2.5rem;
}
#btn-reset {
	position:absolute;
	bottom: -10%;
}
.cell {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(
    to bottom,
    rgba(61, 0, 0, 0),
    rgba(61, 0, 0, 1) 20%,
    rgba(61, 0, 0, 1) 80%,
    rgba(61, 0, 0, 0)
  );
}
.cell span {
  position: absolute;
	left: 0;
  top: 100%;
  width: 100%;
  height: 100%;
  animation: autoSlide 2s linear infinite;
  animation-delay: calc((2s / 3) * (3 - var(--i)) * -1);
}
@keyframes autoSlide {
  to {
    top: -200%;
  }
}

.cell span:nth-child(1) {
	background-image: url('https://images.vexels.com/content/145641/preview/earth-stone-illustration-8dd583.png');
}
.cell span:nth-child(2) {
	background-image: url('https://cdn-icons-png.freepik.com/512/2541/2541988.png');
}
.cell span:nth-child(3) {
	background-image: url('https://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Gtk-cut.svg/1024px-Gtk-cut.svg.png');
}

#result {
	position: absolute;
	font-size: 5rem;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	text-shadow: 0px 0px 60px rgba(0, 0, 0, 1), 0px 0px 60px rgba(0, 0, 0, 1), 0px 0px 60px rgba(0, 0, 0, 1);
	padding: 30px 80px;
	pointer-events: none;
	display: none;
}

JS

const $armors = document.querySelectorAll('.armor');
const $start = document.getElementById('btn-start');
const $yourArm = document.getElementById('yourArm');
const $botArm = document.getElementById('botArm');
const $pvp = document.getElementById('pvp');
const $getReady = document.getElementById('getReady');
const $btnReset = document.getElementById('btn-reset');
const $cell = document.querySelector('.cell');
const $result = document.getElementById('result');

const resourceLink = {
	rock: 'https://images.vexels.com/content/145641/preview/earth-stone-illustration-8dd583.png',
	paper: 'https://cdn-icons-png.freepik.com/512/2541/2541988.png',
	scissor: 'https://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Gtk-cut.svg/1024px-Gtk-cut.svg.png'
}

let currentArm = '';
let currentBotArm = '';
let state = '';
let botArmy = '';

const selectWin = (me, bot)=>{
	if (me == bot) return 'DRAW';
	else if (
		(me == 'rock' && bot == 'scissor') ||
		(me == 'scissor' && bot == 'paper') ||
		(me == 'paper' && bot == 'rock')
	) {return 'WIN'};
	return "TRY AGAIN";
}

const reset = ()=>{
	confetti.reset();
	estate = '';
	currentArm = '';
	botArmy = '';
	currentBotArm = '';
	$getReady.style.opacity = '1';
	$pvp.style.display = 'none';
	removeSelection();
	$cell.style.opacity = '1';
	$botArm.style.backgroundImage = 'none';
	$result.innerText = '';
	$result.style.display = 'none';
}

const machineArm = ()=>{
	const select = ['rock', 'paper', 'scissor'];
	const random = Math.floor(Math.random()*3);
	return select[random];
}

const removeSelection = ()=>$armors.forEach(arm=>arm.classList.remove('active'));

$armors.forEach(army=>{
	army.addEventListener('click',(e)=>{
		removeSelection();
		currentArm = e.target.id;
		e.target.classList.add('active');
	})
})
$start.addEventListener('click', ()=>{
	if (!currentArm) {
		alert('Select an army');
		return;
	}
	$getReady.style.opacity = '0';
	$pvp.style.display = 'flex';
	$yourArm.style.backgroundImage = `url(${resourceLink[currentArm]})`;
	currentBotArm = machineArm();
	setTimeout(()=>{
		$cell.style.opacity = '0';
		$botArm.style.backgroundImage = `url(${resourceLink[currentBotArm]})`
	}, 2000);
	setTimeout(()=>{
		state = selectWin(currentArm, currentBotArm);
		$result.innerText = state;
		$result.style.display = 'inherit';
		if (state == 'WIN') {confetti()}
	}, 2500);
})
$btnReset.addEventListener('click', reset);

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