.big {
				width: 100px;
				height: 100px;
				background: skyblue;
				display: flex;
				margin-top: 20px;
			} 
			.small {
				width: 10px;
				height: 10px;
				background: purple;
				border-radius: 5px;
			}
			
			.one {
				display: flex;
				justify-content: center;
				/*交叉轴*/
				align-items: center;
			}
			
			.two {
				display: flex;
				justify-content: space-around;
				align-items: center;
			}
			
			.two2 {
				display: flex;
				flex-direction: column;
				justify-content: space-around;
				align-items: center;
			}
			
			.three {
				display: flex;
				flex-direction: column;
				justify-content: space-between;
				align-items: center;
			}
			
			.four {
				display: flex;
				justify-content: space-around;
			}
			
			.four1 {
				display: flex;
				justify-content: space-around;
				align-items: center;
			}
			
			.four2 {
				display: flex;
				flex-direction: column;
				justify-content: space-around;
				align-items: center;
			}
			
			.five {
				display: flex;
				justify-content: space-around;
			}
			
			.five1 {
				display: flex;
				flex-direction: column;
				justify-content: space-around;
				align-items: center;
			}
			
			.five2 {
				display: flex;
				flex-direction: row;
				align-self: center;
			}
			
			.six {
				display: flex;
				justify-content: space-around;
			}
			
			.six1 {
				display: flex;
				flex-direction: column;
				justify-content: space-around;
				align-items: center;
			}