.footer1 {
  width: 10%;
  height: 500px;
  float: left;
  margin-top: -10px;
  background-color: silver;
}


.footer2 {
  margin-top: -10px;
  height: 500px;
  width: 40%;
  background-color: silver;
  color: white;
  line-height: 150%;
  float: left;
}

.footer2 a:link {
  color: white;
}

.footer2 a:hover {
  color: lightgray;
}

.footer2 a:visited {
  color: darkgray;
}

.footer3 {
  margin-top: -10px;
  height: 500px;
  width: 40%;
  background-color: silver;
  color: white;
  line-height: 150%;
  float: left;
}

.footer4 {
  width: 10%;
  height: 500px;
  float: left;
  margin-top: -10px;
  background-color: silver;
}