------------------- THIS IS THE HTML ---------------------

<!-- alert image -->
<div id="alert-image-wrap">
  <div id="alert-image">{img}</div>
</div>

<!-- main alert box window -->
<div id="alert-text-wrap">

  <!-- alert text -->
  <div id="alert-text">

    <!-- alert message -->
    <!-- messageTemplate will be replaced with your message template -->
    <!-- for example : {name} is now following! or {name} donated {amount} -->

    <div id="alert-message">{name}</div>

  </div>

</div>


--------------- THIS IS THE CSS ----------------------


.widget-AlertBox {
    position: relative;
}
body,
html {
    height: 100%;
    width: 100%;
    overflow: hidden;
}
#wrap {
    position: relative;
    height: 100%;
    width: 100%;
}
#alert-box {
    height: 100%;
    width: 100%;
    position: absolute;
}
#alert-box.hidden,
.hidden {
    opacity: 0;
}
#alert-text {
    padding: 20px;
}
#alert-message,
#alert-user-message {
    text-align: center;
}
#alert-user-message img {
    vertical-align: middle;
    height: 1em;
}
#alert-image {
    position: relative;
}
#alert-image video {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}
#alert-message {
    display: inline-block;
    animation-duration: 3s;
    animation-name: fade;
    animation-delay: 3s;
    opacity: 0;
    width: 375px;
  	height: 160px;
    margin-left: 285px;
    margin-top: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fade {
  0% {opacity: 1}
  90% {opacity: 1}
  100% {opacity: 0}
}

#alert-image {
    z-index: 6;
    position: relative;
}
#alert-text {
    z-index: 6;
    position: relative;
}
#alert-text-wrap {
    z-index: 6;
    position: relative;
}