1. Demo




2. Code

<style>
#qid {
  padding: 10px 15px;
  -moz-border-radius: 50px;
  -webkit-border-radius: 50px;
  border-radius: 20px;
}
label.btn {
    padding: 18px 60px;
    white-space: normal;
    -webkit-transform: scale(1.0);
    -moz-transform: scale(1.0);
    -o-transform: scale(1.0);
    -webkit-transition-duration: .3s;
    -moz-transition-duration: .3s;
    -o-transition-duration: .3s
}
label.btn:hover {
    text-shadow: 0 3px 2px rgba(0,0,0,0.4);
    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    -o-transform: scale(1.1)
}
label.btn-block {
    text-align: left;
    position: relative
}
label .btn-label {
    position: absolute;
    left: 0;
    top: 0;
    display: inline-block;
    padding: 0 10px;
    background: rgba(0,0,0,.15);
    height: 100%
}
label .glyphicon {
    top: 34%
}
.element-animation1 {
    animation: animationFrames ease .8s;
    animation-iteration-count: 1;
    transform-origin: 50% 50%;
    -webkit-animation: animationFrames ease .8s;
    -webkit-animation-iteration-count: 1;
    -webkit-transform-origin: 50% 50%;
    -ms-animation: animationFrames ease .8s;
    -ms-animation-iteration-count: 1;
    -ms-transform-origin: 50% 50%
}
.element-animation2 {
    animation: animationFrames ease 1s;
    animation-iteration-count: 1;
    transform-origin: 50% 50%;
    -webkit-animation: animationFrames ease 1s;
    -webkit-animation-iteration-count: 1;
    -webkit-transform-origin: 50% 50%;
    -ms-animation: animationFrames ease 1s;
    -ms-animation-iteration-count: 1;
    -ms-transform-origin: 50% 50%
}
.element-animation3 {
    animation: animationFrames ease 1.2s;
    animation-iteration-count: 1;
    transform-origin: 50% 50%;
    -webkit-animation: animationFrames ease 1.2s;
    -webkit-animation-iteration-count: 1;
    -webkit-transform-origin: 50% 50%;
    -ms-animation: animationFrames ease 1.2s;
    -ms-animation-iteration-count: 1;
    -ms-transform-origin: 50% 50%
}
.element-animation4 {
    animation: animationFrames ease 1.4s;
    animation-iteration-count: 1;
    transform-origin: 50% 50%;
    -webkit-animation: animationFrames ease 1.4s;
    -webkit-animation-iteration-count: 1;
    -webkit-transform-origin: 50% 50%;
    -ms-animation: animationFrames ease 1.4s;
    -ms-animation-iteration-count: 1;
    -ms-transform-origin: 50% 50%
}
@keyframes animationFrames {
    0% {
        opacity: 0;
        transform: translate(-1500px,0px)
    }
    60% {
        opacity: 1;
        transform: translate(30px,0px)
    }
    80% {
        transform: translate(-10px,0px)
    }
    100% {
        opacity: 1;
        transform: translate(0px,0px)
    }
}
@-webkit-keyframes animationFrames {
    0% {
        opacity: 0;
        -webkit-transform: translate(-1500px,0px)
    }
    60% {
        opacity: 1;
        -webkit-transform: translate(30px,0px)
    }
    80% {
        -webkit-transform: translate(-10px,0px)
    }
    100% {
        opacity: 1;
        -webkit-transform: translate(0px,0px)
    }
}
@-ms-keyframes animationFrames {
    0% {
        opacity: 0;
        -ms-transform: translate(-1500px,0px)
    }
    60% {
        opacity: 1;
        -ms-transform: translate(30px,0px)
    }
    80% {
        -ms-transform: translate(-10px,0px)
    }
    100% {
        opacity: 1;
        -ms-transform: translate(0px,0px)
    }
}
.modal-header {
    background-color: transparent;
    color: inherit
}
.modal-body {
    min-height: 205px
}
#loadbar {
    position: absolute;
    width: 62px;
    height: 77px;
    top: 2em
}
.blockG {
    position: absolute;
    background-color: #FFF;
    width: 10px;
    height: 24px;
    -moz-border-radius: 8px 8px 0 0;
    -moz-transform: scale(0.4);
    -moz-animation-name: fadeG;
    -moz-animation-duration: .8800000000000001s;
    -moz-animation-iteration-count: infinite;
    -moz-animation-direction: linear;
    -webkit-border-radius: 8px 8px 0 0;
    -webkit-transform: scale(0.4);
    -webkit-animation-name: fadeG;
    -webkit-animation-duration: .8800000000000001s;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-direction: linear;
    -ms-border-radius: 8px 8px 0 0;
    -ms-transform: scale(0.4);
    -ms-animation-name: fadeG;
    -ms-animation-duration: .8800000000000001s;
    -ms-animation-iteration-count: infinite;
    -ms-animation-direction: linear;
    -o-border-radius: 8px 8px 0 0;
    -o-transform: scale(0.4);
    -o-animation-name: fadeG;
    -o-animation-duration: .8800000000000001s;
    -o-animation-iteration-count: infinite;
    -o-animation-direction: linear;
    border-radius: 8px 8px 0 0;
    transform: scale(0.4);
    animation-name: fadeG;
    animation-duration: .8800000000000001s;
    animation-iteration-count: infinite;
    animation-direction: linear
}
#rotateG_01 {
    left: 0;
    top: 28px;
    -moz-animation-delay: .33s;
    -moz-transform: rotate(-90deg);
    -webkit-animation-delay: .33s;
    -webkit-transform: rotate(-90deg);
    -ms-animation-delay: .33s;
    -ms-transform: rotate(-90deg);
    -o-animation-delay: .33s;
    -o-transform: rotate(-90deg);
    animation-delay: .33s;
    transform: rotate(-90deg)
}
#rotateG_02 {
    left: 8px;
    top: 10px;
    -moz-animation-delay: .44000000000000006s;
    -moz-transform: rotate(-45deg);
    -webkit-animation-delay: .44000000000000006s;
    -webkit-transform: rotate(-45deg);
    -ms-animation-delay: .44000000000000006s;
    -ms-transform: rotate(-45deg);
    -o-animation-delay: .44000000000000006s;
    -o-transform: rotate(-45deg);
    animation-delay: .44000000000000006s;
    transform: rotate(-45deg)
}
#rotateG_03 {
    left: 26px;
    top: 3px;
    -moz-animation-delay: .55s;
    -moz-transform: rotate(0deg);
    -webkit-animation-delay: .55s;
    -webkit-transform: rotate(0deg);
    -ms-animation-delay: .55s;
    -ms-transform: rotate(0deg);
    -o-animation-delay: .55s;
    -o-transform: rotate(0deg);
    animation-delay: .55s;
    transform: rotate(0deg)
}
#rotateG_04 {
    right: 8px;
    top: 10px;
    -moz-animation-delay: .66s;
    -moz-transform: rotate(45deg);
    -webkit-animation-delay: .66s;
    -webkit-transform: rotate(45deg);
    -ms-animation-delay: .66s;
    -ms-transform: rotate(45deg);
    -o-animation-delay: .66s;
    -o-transform: rotate(45deg);
    animation-delay: .66s;
    transform: rotate(45deg)
}
#rotateG_05 {
    right: 0;
    top: 28px;
    -moz-animation-delay: .7700000000000001s;
    -moz-transform: rotate(90deg);
    -webkit-animation-delay: .7700000000000001s;
    -webkit-transform: rotate(90deg);
    -ms-animation-delay: .7700000000000001s;
    -ms-transform: rotate(90deg);
    -o-animation-delay: .7700000000000001s;
    -o-transform: rotate(90deg);
    animation-delay: .7700000000000001s;
    transform: rotate(90deg)
}
#rotateG_06 {
    right: 8px;
    bottom: 7px;
    -moz-animation-delay: .8800000000000001s;
    -moz-transform: rotate(135deg);
    -webkit-animation-delay: .8800000000000001s;
    -webkit-transform: rotate(135deg);
    -ms-animation-delay: .8800000000000001s;
    -ms-transform: rotate(135deg);
    -o-animation-delay: .8800000000000001s;
    -o-transform: rotate(135deg);
    animation-delay: .8800000000000001s;
    transform: rotate(135deg)
}
#rotateG_07 {
    bottom: 0;
    left: 26px;
    -moz-animation-delay: .99s;
    -moz-transform: rotate(180deg);
    -webkit-animation-delay: .99s;
    -webkit-transform: rotate(180deg);
    -ms-animation-delay: .99s;
    -ms-transform: rotate(180deg);
    -o-animation-delay: .99s;
    -o-transform: rotate(180deg);
    animation-delay: .99s;
    transform: rotate(180deg)
}
#rotateG_08 {
    left: 8px;
    bottom: 7px;
    -moz-animation-delay: 1.1s;
    -moz-transform: rotate(-135deg);
    -webkit-animation-delay: 1.1s;
    -webkit-transform: rotate(-135deg);
    -ms-animation-delay: 1.1s;
    -ms-transform: rotate(-135deg);
    -o-animation-delay: 1.1s;
    -o-transform: rotate(-135deg);
    animation-delay: 1.1s;
    transform: rotate(-135deg)
}
@-moz-keyframes fadeG {
    0% {
        background-color: #000
    }
    100% {
        background-color: #FFF
    }
}
@-webkit-keyframes fadeG {
    0% {
        background-color: #000
    }
    100% {
        background-color: #FFF
    }
}
@-ms-keyframes fadeG {
    0% {
        background-color: #000
    }
    100% {
        background-color: #FFF
    }
}
@-o-keyframes fadeG {
    0% {
        background-color: #000
    }
    100% {
        background-color: #FFF
    }
}
@keyframes fadeG {
    0% {
        background-color: #000
    }
    100% {
        background-color: #FFF
    }
}
</style>
<div class="container-fluid bg-info">
    <div class="modal-dialog">
      <div class="modal-content">
         <div class="modal-header">
            <h3><span class="label label-warning" id="qid">2</span> THREE is CORRECT</h3>
        </div>
        <div class="modal-body">
            <div class="col-xs-3 col-xs-offset-5">
               <div id="loadbar" style="display: none;">
                  <div class="blockG" id="rotateG_01"></div>
                  <div class="blockG" id="rotateG_02"></div>
                  <div class="blockG" id="rotateG_03"></div>
                  <div class="blockG" id="rotateG_04"></div>
                  <div class="blockG" id="rotateG_05"></div>
                  <div class="blockG" id="rotateG_06"></div>
                  <div class="blockG" id="rotateG_07"></div>
                  <div class="blockG" id="rotateG_08"></div>
              </div>
          </div>
          <div class="quiz" id="quiz" data-toggle="buttons">
           <label class="element-animation1 btn btn-lg btn-primary btn-block"><span class="btn-label"><i class="glyphicon glyphicon-chevron-right"></i></span> <input type="radio" name="q_answer" value="1">1 One</label>
           <label class="element-animation2 btn btn-lg btn-primary btn-block"><span class="btn-label"><i class="glyphicon glyphicon-chevron-right"></i></span> <input type="radio" name="q_answer" value="2">2 Two</label>
           <label class="element-animation3 btn btn-lg btn-primary btn-block"><span class="btn-label"><i class="glyphicon glyphicon-chevron-right"></i></span> <input type="radio" name="q_answer" value="3">3 Three</label>
           <label class="element-animation4 btn btn-lg btn-primary btn-block"><span class="btn-label"><i class="glyphicon glyphicon-chevron-right"></i></span> <input type="radio" name="q_answer" value="4">4 Four</label>
       </div>
   </div>
   <div class="modal-footer text-muted">
    <span id="answer"></span>
</div>
</div>
</div>
</div>
<script>
$(function(){
    var loading = $('#loadbar').hide();
    $(document)
    .ajaxStart(function () {
        loading.show();
    }).ajaxStop(function () {
    loading.hide();
    });
    
    $("label.btn").on('click',function () {
    var choice = $(this).find('input:radio').val();
    $('#loadbar').show();
    $('#quiz').fadeOut();
    setTimeout(function(){
           $( "#answer" ).html(  $(this).checking(choice) );      
            $('#quiz').show();
            $('#loadbar').fadeOut();
           /* something else */
    }, 1500);
    });
    $ans = 3;
    $.fn.checking = function(ck) {
        if (ck != $ans)
            return 'INCORRECT';
        else 
            return 'CORRECT';
    }; 
});
</script>


airplanemode_active