直播气泡滚动效果

.bub1>p{
	animation: beatn 6s ease 0s infinite normal;
}
.bub2>p{
	animation: beatu 6s ease 2s infinite normal;
}
.bub3>p{
	animation: beatt 6s ease 4s infinite normal;
}
@keyframes beatn {
	0% {
		transform: translateY(34px);
		background: #444;
		opacity: 1;
		background-color: 
	}	
	17% {
		transform: translateY(0px);
		background: #444;
		opacity: 1;
	}
	33% {
		transform: translateY(0px);
		background: #444;
		opacity: 1;
	}
	50% {
		transform: translateY(-34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top, rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	66% {
		transform: translateY(-34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top, rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	85% {
		transform: translateY(-68px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
	100% {
		transform: translateY(-68px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
}
@keyframes beatu {
	0% {
		transform: translateY(68px);
		background: #444;
		opacity: 1;
	}	
	17% {
		transform: translateY(34px);
		background: #444;
		opacity: 1;
	}
	33% {
		transform: translateY(34px);
		background: #444;
		opacity: 1;
	}
	50% {
		transform: translateY(0px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top, rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	66% {
		transform: translateY(0px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top, rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	85% {
		transform: translateY(-34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
	100% {
		transform: translateY(-34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
}
@keyframes beatt {
	0% {
		transform: translateY(102px);
		background: #444;
		opacity: 1;
	}	
	17% {
		transform: translateY(68px);
		background: #444;
		opacity: 1;
	}
	33% {
		transform: translateY(68px);
		background: #444;
		opacity: 1;
	}
	50% {
		transform: translateY(34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top, rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	66% {
		transform: translateY(34px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,1),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,1),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 12px;
		color: #fff;
	}
	85% {
		transform: translateY(0px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
	100% {
		transform: translateY(0px);
		display: flex;
		align-items:center;
		height: 25px;
		background: -webkit-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Safari 5.1 - 6 */
		background: -o-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Opera 11.1 - 12*/
		background: -moz-linear-gradient(top,rgba(68,68,68,0),rgba(68,68,68,0)); /* Firefox 3.6 - 15*/
		background: linear-gradient(to top,rgba(68,68,68,0),rgba(68,68,68,0)); /* 标准的语法 */
		border: none;
		outline: none;
		border-radius: 25px;
		padding: 2px 15px;
		font-size: 11px;
		color: #fff;
		opacity: 0.5;
	}
}

　　

效果图：