console 命令行工具 X clear

console

<div class="one"></div>
<div class="two"></div>
<div class="three"></div>

div{
  width:200px;
  height:100px;
  background:	#90EE90;
  float:left;
}

.one{
  border-radius:50% 0 50% 0/100% 0 100% 0;
}

.two{
  border-radius:100% 0 100% 0;
}
.three{
    height:200px;
    border-radius:100% 100% 100% 0/100% 100% 100% 0;
}