body {
  margin: 0;
  padding: 0;
}

h1,h2,h3,h4,h5,h6,p {
  margin-top: 0;
}

#first{
  float: right;
}

#second {
  position: absolute;
  right: 240px;
  top: 846px;
}

#third {
  position: fixed;
  background-color: green;
  right: 0;
  top: 0;
}

#red {
  background-color: red;
  position: relative;
  left: 550px;
  z-index: 2;
  position: absolute;
}

#black {
  background-color: black;
  position: relative;
  left: 560px;
  position: absolute;
  margin-top: 10px;
  z-index: 1;
}