.circle:before{content:"";display:block;width:20px;height:15px;background-color:#fff;border-top-left-radius:50px;border-top-right-radius:50px;position:absolute;transform:rotate(90deg);bottom:-7px;left:-17px}.circle:after{content:"";display:block;width:20px;height:15px;background-color:#fff;border-top-left-radius:50px;border-top-right-radius:50px;position:absolute;transform:rotate(270deg);bottom:-7px;right:-17px}