FadeIn on load Multiple div

HTML:
<body>

<div class="box fade-in one">
       1) look at me fade in
</div>

<div class="box fade-in two">
      2)  Oh hi! i can fade too!
</div>

<div class="box fade-in three">
      3) Oh hi! i can fade three!
</div>

</body>

CSS:

/* make keyframes that tell the start state and the end state of our object */

@-webkit-keyframes fadeIn { from { opacity:0; opacity: 1\9; /* IE9 only */ } to { opacity:1; } }
@-moz-keyframes fadeIn { from { opacity:0; opacity: 1\9; /* IE9 only */ } to { opacity:1; } }
@keyframes fadeIn { from { opacity:0; opacity: 1\9; /* IE9 only */ } to { opacity:1; } }

.fade-in {
    opacity:0;  /* make things invisible upon start */
    -webkit-animation:fadeIn ease-in 1;  /* call our keyframe named fadeIn, use animattion ease-in and repeat it only 1 time */
    -moz-animation:fadeIn ease-in 1;
    animation:fadeIn ease-in 1;

    -webkit-animation-fill-mode:forwards;  /* this makes sure that after animation is done we remain at the last keyframe value (opacity: 1)*/
    -moz-animation-fill-mode:forwards;
    animation-fill-mode:forwards;

    -webkit-animation-duration:1s;
    -moz-animation-duration:1s;
    animation-duration:1s;
}

.fade-in.one {
-webkit-animation-delay: 0.7s;
-moz-animation-delay: 0.7s;
animation-delay: 0.7s;
}

.fade-in.two {
-webkit-animation-delay: 1.2s;
-moz-animation-delay:1.2s;
animation-delay: 1.2s;
}

.fade-in.three {
-webkit-animation-delay: 1.6s;
-moz-animation-delay: 1.6s;
animation-delay: 1.6s;
}

/*---make a basic box ---*/
.box{
width: 100px;
height: 100px;
position: relative;
margin: 10px;
color: white;
padding: 40px;
float: left;
border: 1px solid #fff;
background: #27a5d2;
border-radius: 10px;
}