#square
{
  width: 50px;
  height: 50px;
  background: darkgreen;
}
#rectangle
{
  width: 50px;
  height: 100px;
  background: purple;
}

#diamond
{
  width: 50px;
  height: 50px;
  background: red;
  transform: rotate(45deg);
}
#circle
{
  width: 100px;
  height: 100px;
  background: blue;
  border-radius: 50%;
}
#oval
{
  width: 100px;
  height: 50px;
  background: yellow;
  border-radius: 50%;
}

#triangle-up
{
  width: 0;
  height: 0;
  border-left: 25px solid transparent;
  border-right: 25px solid transparent;
  border-bottom: 50px solid pink;
}

#triangle-right
{
  width: 0;
  height: 0;
  border-top: 25px solid transparent;
  border-bottom: 25px solid transparent;
  border-left: 50px solid lightgrey;
}

#trapezoid
{
  border-bottom: 25px solid lightblue;
  border-left: 20px solid transparent;
  border-right: 20px solid transparent;
  width: 60px;
  height: 0px;
}

}