.yellow
{
  background-color : yellow;
  height : 10px;
  width: 10px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 10px;
}

.red
{
  background-color : red;
  height : 10px;
  width: 10px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 10px;
}


.blue
{
  background-color : blue;
}



.widthh
{
  height : 20px;
  width: 20px;
}