.container {
border-width: 7px; 
border-style: solid; 
border-image: url("https://i.imgur.com/8Tk8PKV.gif") 7 fill round;
  margin: auto;
  width: 884px;
  height: 665px;
  position: relative;
  padding: 5px;
  z-index: 4;
}

.container-one {
border-width: 1px;
  border-style: solid;
  border-color: white;
  background-image: url('https://i1.glitter-graphics.org/pub/736/736631qlay40dtdd.jpg');
    background-size: cover; 
    background-position: center;
  background-repeat: repeat;
  width: 880px;
  position: relative;
  left: 1px;
  height: 170px;
  box-shadow: 0 0 8px 8px white inset;
  z-index: 5;
}

.nav {
  border-width: 7px;
  border-image: url("https://i.imgur.com/8Tk8PKV.gif") 7 fill round;
  border-style: solid;
  width: 21%; 
  height: 76%;
  margin-top: 1%;
  float: left;
  margin-right: 10px;
}