#red-box
{
  background: red;
}
#orange-box
{
  background:orange;
}
#yellow-box
{
  background:yellow;
}
#green-box
{
  background:green;
}
#blue-box
{
  background:blue;
}
#violet-box
{
  background:violet;
}
div
{
  
 height: 100px;
  width: 100px;
  border-radius: 50%;
  margin:auto;
  margin-bottom: 10px;