#project1, #project2, #project3 {
  display: none;
}

body {
  background: url("https://images.unsplash.com/photo-1483205464475-6204a96e1ef3?dpr=1&auto=format&fit=crop&w=1500&h=1000&q=80&cs=tinysrgb&crop=");
}

.wrap {
    margin: auto;
    width: 50%;
    border: 2px solid #eeecec;
    padding: 70px;
    margin-top: 50px;
}

a {
  color: #000080;
  font-family: sans-serif;
}

img {
    display: block;
    margin: auto;
    width: 80%;
    align-self: center;
}


.footer {
   display: table;
   text-align: center;
   font-family: sans-serif;
   margin-left: auto;
   margin-right: auto;
}

#project1, #project2, #project3 {
  display: none;
}

body {
  background: url("https://images.unsplash.com/photo-1483205464475-6204a96e1ef3?dpr=1&auto=format&fit=crop&w=1500&h=1000&q=80&cs=tinysrgb&crop=");
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.wrap {
    margin: auto;
    width: 50%;
    border: 2px solid #eeecec;
    padding: 70px;
    margin-top: 50px;
}

a {
  color: #000080;
  font-family: sans-serif;
}

img {
    display: block;
    margin: auto;
    width: 80%;
    align-self: center;
}


.footer {
   display: table;
   text-align: center;
   font-family: sans-serif;
   margin-left: auto;
   margin-right: auto;
}

Add background css to make it fixed
Add background css to make it fixed
