html, body
{
    margin: 0;
    padding: 0;
    color: white;
}
a {color: green;}
a:link {color: green;}
a:visited {color: purple;}
a:hover {color: red;}
a:active {color: blue;}

.container
{
  position: relative;
  text-align: left;
}

.top-left
{
  position: absolute;
  top: 8px;
  left: 16px;
  height: 30%;
  width: 30%;
}

.top-right
{
  position: absolute;
  top: 8px;
  right: 16px;
  height: 30%;
  width: 30%;
}

.centre
{
  position: absolute;
  top: 50%;
  left: 50%;
  height: 30%;
  width: 30%;
  transform: translate(-50%, -50%);
}

.bottom-left
{
  position: absolute;
  bottom: 8px;
  left: 16px;
  height: 30%;
  width: 30%;
}

.bottom-right
{
  position: absolute;
  bottom: 8px;
  right: 16px;
  height: 30%;
  width: 30%;
}