th to the left.
  2nd <length>
    Specifies the vertical offset
    of the shadow. A positive value offsets the shadow down, a negative one up.
  4th <length>
    Specifies the spread distance. Positive values cause the shadow to expand in all directions by the specified radius. Negative values cause the shadow to contract.

  -->

  <style>
  div#green-overlapping-test
    {
      background-color: red;
      height: 0px;
      width: 0px;

      box-shadow: green 50px 50px 0px 50px;
    }

  div#red-over