css3转盘

此效果涉及到 ：

1. css 画图形

2. css3 动态效果

3. 贝塞尔曲线 用法

<style>
.lds-hourglass {
display: inline-block;
position: relative;
72px;
height: 72px
}

.lds-hourglass:after {
content: " ";
display: block;
border-radius: 50%;
0;
height: 0;
margin: 6px;
box-sizing: border-box;
border: 36px solid #ff8686;
border-color: #ffabab transparent #35999e;
animation: lds-hourglass 1.2s infinite
}

@keyframes lds-hourglass {
0% {
transform: rotate(0);
animation-timing-function: cubic-bezier(.55,.055,.675,.19)
}

50% {
transform: rotate(900deg);
animation-timing-function: cubic-bezier(.215,.61,.355,1)
}

100% {
transform: rotate(1800deg)
}
}
</style>

<div class="lds-hourglass"></div>

扩展：3d转换

贝塞尔曲线扫盲