nav {
  position: fixed;
  right: left;
  top: 15%;
  width: 150px;

  background-color: bisque;
  border-radius: 10px;
  }

article {
	margin-left: 150px;
  background-color: cadetblue;
  border-radius: 10px;
  padding:5px 5px;
  margin-top: 5px;
}

aside {
	margin-left: 150px;
  background-color: cadetblue;
  border-radius: 10px;
}


footer, header {
  background-color: cadetblue;
  border-radius: 10px;
  padding:5px 5px;
}


#bloc_page
{
    width: 900px;
    margin: auto;

}