.color1  {color:white;} 
     .color2  {background-color: lightyellow; }
      div {text-align:center;margin-left: auto; margin-right:auto;color:white;}
      div table{margin-left: auto; margin-right: auto;color:white;}
     .td2{height: 100px;width:100px;background-color:teal; }
     .td1{height: 200px;width:200px;background-color:black;}
     .td3{height: 100px;width:100px;background-color:black;}