CSS: Shapes

SQUARE

.square
{

  height: 100px;
  width: 100px;
  background-color: #333300;
}

RECTANGLE

.rectangle
{
width: 200px;
height: 100px;
background: #333300;
}

CIRCLE

.circle {
   position: relative;
   height: 150px;
   width: 150px;
   background-color: #333300;
   border-radius: 150px;
}