style.css

body {
  padding-bottom: 100px;
  margin-left: 5%;
  margin-right: 5%;
  width: 100%;
  height: 100%;
  color: #000;
}

#hover {
  width: 300px;
  height: 100px;
  background-color: #39B7CD;
}
.green {
  border: 4px solid #00AF33;
}
.hideMe {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: #FF6103;
  margin-left: 100px;
}
.cute {
  height: 100px;
  margin-left: 20px;
}
#makeSquare {
  width: 300px;
  height: 120px;
  border-radius: 10px;
  background-color: #C82536;
}
#dontClick{
  width: 180px;
  background-color: #7CFC00;
  color: #000;
  font-size: 20px;
  border: solid #7CFC00;
}
.swatch {
  height: 100px;
  width: 100px;
  border-radius: 50%;
  float: left;
  margin-right: 20px;
}
.swatches:after {
  content: "";
  display: table;
  clear: both;
}
.black {
  background-color: #000;
  color: #fff;
}
.wood {
  background-image: url("http://phandroid.s3.amazonaws.com/wp-content/uploads/2015/03/wood-wallpaper-3.jpg");
  background-size: 100%;
  color: #fff;
}
.chaos {
  background-image: url("http://www.henderson-art.co.uk/art/wallpaper/chaos.jpg");
  background-size: 100%;
  color: #fff;
}
hr {
 margin: 50px 0;   
}