⇒実際に画像を回転させているページはこちら
<div>
	<style>
		* {
			padding: 0;
			margin: 0;
		}
		.base {
            //背景にグラデーション
			position: relative;
			background: linear-gradient(rgb(24, 176, 218), rgb(255, 255, 255));
			height: 500px;
			width: 100%;
		}

		.triangle img {
			animation: 3s linear infinite rotation1;
			width: 100%;
		}

		.f1 {
			position: absolute;
			top: 50px;
			left: 20%;
			width: 80px;
		}

		.f1 img {
			filter: hue-rotate(80deg);
		}

		.f2 {
			position: absolute;
			top: 150px;
			left: 40%;
			width: 240px;
		}

		@keyframes rotation1 {
			0% {
				transform: rotate(0);
			}

			100% {
				transform: rotate(360deg);
			}
		}
	</style>
	<div class="base">
		<div class="triangle f1"><img src="img.png"></div>
		<div class="triangle f2"><img src="img.png"></div>
	</div>
</div>