body {
  background-image: url("pi_pixgraf.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
  background-size: cover;

}

h1 {
  color: white;
  text-align: center;
  font-family: verdana, Geneva, sans-serif;
}
p {
  color: lightgrey;
  text-align: center;
  font-family: verdana, Geneva, sans-serif;
  font-size:  25px;
}

img {
  display: center;
  margin-left: 20px;
  margin-right: 20px;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
 
}