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HTML 

              
                <main>
	<div class="cat">
		<div class="cat-body-upper">
			<div class="cat-head">
				<div class="right-ear"></div>
				<div class="left-ear"></div>
				<div class="right-eye"></div>
				<div class="left-eye"></div>
			</div>
			<div class="right-arm">
				<div class="right-paw"></div>
			</div>
			<div class="left-arm">
				<div class="right-paw"></div>
			</div>
			<div class="cat-body-lower">
				<div class="balloon-str-loop">
					<div class="balloon-str-pt1">
						<div class="balloon-str-pt2">
							<div class="balloon-str-pt3">
								<div class="balloon-str-pt4">
									<div class="balloon-str-pt5">
										<div class="balloon-str-pt6">
											<div class="balloon-str-pt7">
												<div class="balloon-str-pt8">
													<div class="balloon-str-pt9">
														<div class="balloon-str-pt10">
															<div class="balloon-str-pt11">
																<span class="balloon"></span>
															</div>
														</div>
													</div>
												</div>
											</div>
										</div>
									</div>
								</div>
							</div>
						</div>
					</div>
				</div>
				<div class="tail-pt1">
					<div class="tail-pt2">
						<div class="tail-pt3">
							<div class="tail-pt4"></div>
						</div>
					</div>
				</div>
				<div class="right-leg">
					<div class="foot"></div>
				</div>
				<div class="left-leg">
					<div class="foot"></div>
				</div>
			</div>
		</div>
	</div>
	<div class="cloud left1"></div>
	<div class="cloud left2"></div>
	<div class="cloud right1"></div>
	<div class="cloud right2"></div>
</main>
!

CSS 

              
                *, *:before, *:after {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	font-size: 16px;
	--catDur: 0.5s;
	--cloudDur: 1s;
}
body {
	background: hsl(199,82.5%,17.6%);
	font: 1em "Helvetica Neue", Helvetica, sans-serif;
	line-height: 1.5;
}
main {
	background: hsl(199,82.5%,77.6%);
	margin: 1.5em auto 0 auto;
	overflow: hidden;
	position: relative;
	width: 40em;
	height: 40em;
}
.cat, .cat div, .cloud {
	position: absolute;
}
.cat, .cat div {
	transform-style: preserve-3d;
}
.cat {
	top: 50%;
	left: 50%;
	transform: translate(-50%,-50%);
	width: 10.4em;
	height: 20.8em;
	z-index: 1;
}
.cat-body-upper {
	background: hsl(0,0%,55%);
	border-radius: 2.5em 2.5em 1em 1em;
	top: 12.3em;
	left: 3em;
	width: 4.4em;
	height: 4.5em;
	transform: rotate(20deg);
	transform-origin: 50% 4em;
}
.cat-head {
	animation: headBobbing var(--catDur) linear infinite;
	background-color: hsl(0,0%,60%);
	background-image:
		/* nose */
		radial-gradient(0.4em 0.4em at 3.6em 1.8em,hsl(0,0%,0%) 48%,hsla(0,0%,0%,0) 50%),
		/* cheeks */
		radial-gradient(0.8em 0.8em at 0.8em 2.4em,hsl(0,100%,79.6%) 48%,hsla(0,100%,79.6%,0) 50%),
		radial-gradient(0.8em 0.8em at 6em 2.4em,hsl(0,100%,79.6%) 48%,hsla(0,100%,79.6%,0) 50%),
		/* mouth */
		radial-gradient(1.6em 1.2em at 2.8em 2.8em,hsl(0,0%,67%) 48%,hsla(0,0%,67%,0) 50%),
		radial-gradient(1.6em 1.2em at 4em 2.8em,hsl(0,0%,67%) 48%,hsla(0,0%,67%,0) 50%),
		radial-gradient(1.6em 1.2em at 2.8em 3em,hsl(0,0%,50%) 48%,hsla(0,0%,50%,0) 50%),
		radial-gradient(1.6em 1.2em at 4em 3em,hsl(0,0%,50%) 48%,hsla(0,0%,50%,0) 50%)
		;
	border-radius: 1.6em 1.6em 2em 2em / 1.2em 1.2em 1.6em 1.6em;
	top: -2em;
	left: 0;
	width: 6.4em;
	height: 4em;
	transform: rotate(-20deg);
	transform-origin: 50% 75%;
	z-index: 2;
}
.right-ear, .left-ear {
	animation: earSwing var(--catDur) linear infinite;
	background: hsl(0,0%,55%);
	bottom: 3.6em;
	width: 2em;
	height: 2em;
	transform: translateZ(-1px);
	transform-origin: 50% 100%;
	z-index: -1;
}
.right-ear {
	border-radius: 0.6em 1.2em 0 0 / 1em 2em 0 0;
	left: 0.5em;
}
.left-ear {
	border-radius: 1.2em 0.6em 0 0 / 2em 1em 0 0;
	right: 0.6em;
}
.right-eye, .left-eye {
	animation: eyeBobbing var(--catDur) linear infinite;
	background: radial-gradient(100% 100% at 30% 30%,hsl(0,0%,87%) 20%,hsl(0,0%,10%) 25%);
	border-radius: 50%;
	top: 0.8em;
	width: 1.2em;
	height: 1.2em;
}
.right-eye {
	left: 1.2em;
}
.left-eye {
	right: 0.8em;
}
.right-arm, .right-paw, .left-arm, .left-paw {
	background-color: hsl(0,0%,60%);
	border-radius: 0.75em;
	transform-origin: 0.75em 0.75em;
	width: 1.5em;
}
.right-arm, .left-arm {
	transform: rotate(-60deg);
	height: 3em;
	z-index: 1;
}
.right-arm {
	top: 1.8em;
	left: 0em;
}
.left-arm {
	top: 0.6em;
	left: 2.8em;
}
.right-paw, .left-paw {
	animation: pawSwing var(--catDur) linear infinite;
	background-image:
		radial-gradient(0.2em 0.4em at 35% 2.6em,hsl(0,0%,45%) 48%,hsla(0,0%,45%,0) 50%),
		radial-gradient(0.2em 0.4em at 75% 2.6em,hsl(0,0%,45%) 48%,hsla(0,0%,45%,0) 50%);
	top: 2em;
	left: 0;
	height: 2.8em;
	transform: rotate(40deg);
}
.cat-body-lower, .right-leg, .left-leg, .foot {
	background: hsl(0,0%,55%);
}
.cat-body-lower {
	animation: bodyLowerUpDown var(--catDur) linear infinite;
	border-radius: 40% 25% 35% 35%;
	top: 1.5em;
	left: 0;
	width: 4.4em;
	height: 5em;
	transform: rotate(-20deg);
	transform-origin: 50% 2em;
}
.balloon-str-loop, .balloon-str-loop div {
	background: hsl(0,0%,10%);
	border-radius: 0.2em;
	width: 0.4em;
	transform-origin: 0.2em 0.2em;
}
.balloon-str-loop {
	top: 1.6em;
	left: -0.2em;
	height: 5.4em;
	transform: rotate(-60deg);
	z-index: 1;
}
.balloon-str-loop div:not(.balloon-str-pt11) {
	height: 1.2em;
}
.balloon-str-loop div > div {
	top: 0.9em;
}
.balloon-str-pt1 {
	animation: stringWobble1 var(--catDur) linear infinite;
	transform: rotate(-120deg);
}
.balloon-str-pt2,
.balloon-str-pt3,
.balloon-str-pt6,
.balloon-str-pt7 {
	animation: stringWobble2 var(--catDur) linear infinite;
}
.balloon-str-pt4,
.balloon-str-pt5,
.balloon-str-pt8,
.balloon-str-pt9 {
	animation: stringWobble3 var(--catDur) linear infinite;
}
.balloon-str-pt11 {
	animation: stringWobble4 var(--catDur) linear infinite;
	height: 0.8em;
	transform: rotate(90deg);
}
.balloon {
	background-color: hsl(8,100%,61%);
	background-image: radial-gradient(1em 1em at 73% 68%,hsl(0,0%,87%) 48%,hsla(0,0%,87%,0) 50%);
	border-radius: 3.8em 2.8em 2.8em 3.8em / 50% 50% 50% 50%;
	box-shadow:
		0.4em 0.2em 0 hsl(8,100%,51%) inset;
	display: block;
	position: absolute;
	top: -2.4em;
	left: 0.4em;
	width: 6.4em;
	height: 5.6em;
	transform: translateZ(-1px);
}
.balloon:before {
	background-color: inherit;
	border-radius: 0 100% 100% 0 / 0 50% 50% 0;
	content: "";
	display: block;
	position: absolute;
	top: 2em;
	left: -1em;
	width: 0.6em;
	height: 1.6em;
}
.right-leg, .left-leg, .foot {
	animation: legSwing var(--catDur) linear infinite;
	width: 1.5em;
	transform-origin: 50% 0.75em;
}
.right-leg, .left-leg {
	bottom: -1em;
	height: 3em;
}
.right-leg {
	border-radius: 0.75em 0.3em 0.75em 0.75em;
	left: 0.2em;
}
.left-leg {
	border-radius: 0.3em 0.75em 0.75em 0.75em;
	right: 0;
}
.foot {
	background-image:
		radial-gradient(0.2em 0.4em at 35% 2em,hsl(0,0%,30%) 48%,hsla(0,0%,30%,0) 50%),
		radial-gradient(0.2em 0.4em at 75% 2em,hsl(0,0%,30%) 48%,hsla(0,0%,30%,0) 50%);
	border-radius: 0.75em;
	top: 1.75em;
	height: 2.25em;
}
.tail-pt1, .tail-pt1 div {
	background: hsl(0,0%,60%);
	width: 1.4em;
	height: 2em;
}
.tail-pt1 {
	border-radius: 0 0 50% 50%;
	top: 3.5em;
	left: 0em;
	transform: translateZ(-1px) rotate(90deg);
	transform-origin: 0.7em 0;
}
.tail-pt2, .tail-pt3, .tail-pt4 {
	animation: tailWag var(--catDur) linear infinite;
	border-radius: 50%;
	top: 0.6em;
	left: 0;
	transform: rotate(20deg);
	transform-origin: 0.8em 0.8em;
}
.cloud {
	background-image:
		radial-gradient(10.8em 10.8em at 9.8em 5.4em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%),
		radial-gradient(6.4em 6.4em at 14.8em 4em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%),
		radial-gradient(5em 5em at 17em 4.6em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%),
		radial-gradient(7em 7em at 16.7em 8.3em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%),
		radial-gradient(12em 10.4em at 10.2em 10em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%),
		radial-gradient(7.6em 7em at 3.8em 8.8em,hsl(0,0%,100%) 49%,hsla(0,0%,100%,0) 50%)
		;
	width: 20.2em;
	height: 15.2em;
}
.left1, .left2 {
	animation: cloudScroll1 var(--cloudDur) linear infinite;
	left: -2em;
}
.right1, .right2 {
	animation: cloudScroll2 var(--cloudDur) linear infinite;
	right: -5.2em;
}
.left1 {
	top: -10em;
}
.left2 {
	top: -60em;
}
.right1 {
	top: 14.8em;
}
.right2 {
	top: -25.2em;
}

/* animations */
@keyframes headBobbing {
	from, to {
		background-position: 0 0;
		transform: rotate(-20deg) translateY(0);
	}
	50% {
		background-position: 0 -0.2em;
		transform: rotate(-20deg) translateY(0.4em);
	}
}
@keyframes earSwing {
	from, to { transform: translateZ(-1px) rotate(0deg) }
	75% { transform: translateZ(-1px) rotate(-9deg) }
}
@keyframes eyeBobbing {
	from, to { transform: translateY(0) scaleY(1) }
	50% { transform: translateY(-0.2em) scaleY(0.92) }
}
@keyframes pawSwing {
	from, to { transform: rotate(40deg) }
	75% { transform: rotate(55deg) }
}
@keyframes legSwing {
	from, to { transform: rotate(0deg) }
	75% { transform: rotate(8deg) }
}
@keyframes stringWobble1 {
	from, to { transform: rotate(-130deg) }
	50% { transform: rotate(-110deg) }
}
@keyframes stringWobble2 {
	from, to { transform: rotate(10deg) }
	50% { transform: rotate(-10deg) }
}
@keyframes stringWobble3 {
	from, to { transform: rotate(-10deg) }
	50% { transform: rotate(10deg) }
}
@keyframes stringWobble4 {
	from, to { transform: rotate(100deg) }
	50% { transform: rotate(80deg) }
}
@keyframes bodyLowerUpDown {
	from, to { height: 5em }
	75% { height: 4.6em }
}
@keyframes tailWag {
	from, to { transform: rotate(20deg) }
	50% { transform: rotate(-20deg) }
}
@keyframes cloudScroll1 {
	from { transform: translateY(0) }
	to { transform: translateY(50em) }
}
@keyframes cloudScroll2 {
	from { transform: translateY(0) }
	to { transform: translateY(40em) }
}
!

JS
!
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