效果预览按下右侧的“点击预览”按钮可以在当前页面预览，点击链接可以全屏预览。https://codepen.io/comehope/pen/RyvgMZ可交互视频教程此视频是可以交互的，你可以随时暂停视频，编辑视频中的代码。请用 chrome, safari, edge 打开观看。https://scrimba.com/c/czPkasr源代码下载每日前端实战系列的全部源代码请从 github 下载：https://github.com/comehope/front-end-daily-challenges代码解读定义 dom，一个容器中包含 3 个 <span>：<div class="penrose"> <span></span> <span></span> <span></span></div>居中显示：html,body { height: 100%; display: flex; align-items: center; justify-content: center; background-color: black;}定义容器尺寸：.penrose { width: 20em; height: 20em;}画出包含 3 条边的容器：.penrose { position: relative;}.penrose span { position: absolute; width: 100%; height: 100%;}.penrose span:nth-child(1) { transform: rotate(0deg);}.penrose span:nth-child(2) { transform: rotate(120deg);}.penrose span:nth-child(3) { transform: rotate(240deg);}为 3 条边所属的容器上色：.penrose { color: red;}.penrose span { background-color: currentColor;}.penrose span:nth-child(1) { filter: brightness(1);}.penrose span:nth-child(2) { filter: brightness(0.66);}.penrose span:nth-child(3) { filter: brightness(0.33);}用遮罩切出每一条边，组成彭罗斯三角形：.penrose span { clip-path: polygon(57% 0, 75% 0, 26% 85%, 89.5% 85%, 98.4% 100%, 0 100%);}.penrose span:nth-child(2) { top: 18.3%; left: 43.3%;}.penrose span:nth-child(3) { top: 46.5%; left: 5.9%;}定义旋转动画效果：.penrose { animation: rotating 30s linear infinite; transform-origin: 66% 66%;}@keyframes rotating { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); }}最后，增加旋转时变色的效果：@keyframes rotating { 0% { color: red; transform: rotate(0deg); } 20% { color: yellow; } 40% { color: lime; } 60% { color: blue; } 80% { color: fuchsia; } 100% { color: red; transform: rotate(720deg); }}大功告成！
