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HTML

              
                <section>
  <div class="square_box box_three"></div>
  <div class="square_box box_four"></div>
  <div class="container mt-5">
    <div class="row">

      <div class="col-sm-12">
        <div class="alert fade alert-simple alert-success alert-dismissible text-left font__family-montserrat font__size-16 font__weight-light brk-library-rendered rendered show">
          <button type="button" class="close font__size-18" data-dismiss="alert">
									<span aria-hidden="true"><a href="https://www.youtube.com/watch?v=_XiOcsj3oNI&t=50s" target="_blank">
                    <i class="fa fa-times greencross"></i>
                    </a></span>
									<span class="sr-only">Close</span> 
								</button>
          <i class="start-icon far fa-check-circle faa-tada animated"></i>
          <strong class="font__weight-semibold">Well done!</strong> You successfullyread this important.
        </div>
      </div>

      <div class="col-sm-12">
        <div class="alert fade alert-simple alert-info alert-dismissible text-left font__family-montserrat font__size-16 font__weight-light brk-library-rendered rendered show" role="alert" data-brk-library="component__alert">
          <button type="button" class="close font__size-18" data-dismiss="alert">
									<span aria-hidden="true">
										<i class="fa fa-times blue-cross"></i>
									</span>
									<span class="sr-only">Close</span>
								</button>
          <i class="start-icon  fa fa-info-circle faa-shake animated"></i>
          <strong class="font__weight-semibold">Heads up!</strong> This alert needs your attention, but it's not super important.
        </div>

      </div>

      <div class="col-sm-12">
        <div class="alert fade alert-simple alert-warning alert-dismissible text-left font__family-montserrat font__size-16 font__weight-light brk-library-rendered rendered show" role="alert" data-brk-library="component__alert">
          <button type="button" class="close font__size-18" data-dismiss="alert">
									<span aria-hidden="true">
										<i class="fa fa-times warning"></i>
									</span>
									<span class="sr-only">Close</span>
								</button>
          <i class="start-icon fa fa-exclamation-triangle faa-flash animated"></i>
          <strong class="font__weight-semibold">Warning!</strong> Better check yourself, you're not looking too good.
        </div>
      </div>

      <div class="col-sm-12">
        <div class="alert fade alert-simple alert-danger alert-dismissible text-left font__family-montserrat font__size-16 font__weight-light brk-library-rendered rendered show" role="alert" data-brk-library="component__alert">
          <button type="button" class="close font__size-18" data-dismiss="alert">
									<span aria-hidden="true">
										<i class="fa fa-times danger "></i>
									</span>
									<span class="sr-only">Close</span>
								</button>
          <i class="start-icon far fa-times-circle faa-pulse animated"></i>
          <strong class="font__weight-semibold">Oh snap!</strong> Change a few things up and try submitting again.
        </div>
      </div>

      <div class="col-sm-12">
        <div class="alert fade alert-simple alert-primary alert-dismissible text-left font__family-montserrat font__size-16 font__weight-light brk-library-rendered rendered show" role="alert" data-brk-library="component__alert">
          <button type="button" class="close font__size-18" data-dismiss="alert">
									<span  aria-hidden="true"><i class="fa fa-times alertprimary"></i></span>
									<span class="sr-only">Close</span>
								</button>
          <i class="start-icon fa fa-thumbs-up faa-bounce animated"></i>
          <strong class="font__weight-semibold">Well done!</strong> You successfullyread this important.
        </div>

      </div>

    </div>
  </div>
</section>
              
            
!

CSS

              
                body
{
  background: #000e29;
}

.alert>.start-icon {
    margin-right: 0;
    min-width: 20px;
    text-align: center;
}

.alert>.start-icon {
    margin-right: 5px;
}

.greencross
{
  font-size:18px;
      color: #25ff0b;
    text-shadow: none;
}

.alert-simple.alert-success
{
  border: 1px solid rgba(36, 241, 6, 0.46);
    background-color: rgba(7, 149, 66, 0.12156862745098039);
    box-shadow: 0px 0px 2px #259c08;
    color: #0ad406;
  text-shadow: 2px 1px #00040a;
  transition:0.5s;
  cursor:pointer;
}
.alert-success:hover{
  background-color: rgba(7, 149, 66, 0.35);
  transition:0.5s;
}
.alert-simple.alert-info
{
  border: 1px solid rgba(6, 44, 241, 0.46);
    background-color: rgba(7, 73, 149, 0.12156862745098039);
    box-shadow: 0px 0px 2px #0396ff;
    color: #0396ff;
  text-shadow: 2px 1px #00040a;
  transition:0.5s;
  cursor:pointer;
}

.alert-info:hover
{
  background-color: rgba(7, 73, 149, 0.35);
  transition:0.5s;
}

.blue-cross
{
  font-size: 18px;
    color: #0bd2ff;
    text-shadow: none;
}

.alert-simple.alert-warning
{
      border: 1px solid rgba(241, 142, 6, 0.81);
    background-color: rgba(220, 128, 1, 0.16);
    box-shadow: 0px 0px 2px #ffb103;
    color: #ffb103;
    text-shadow: 2px 1px #00040a;
  transition:0.5s;
  cursor:pointer;
}

.alert-warning:hover{
  background-color: rgba(220, 128, 1, 0.33);
  transition:0.5s;
}

.warning
{
      font-size: 18px;
    color: #ffb40b;
    text-shadow: none;
}

.alert-simple.alert-danger
{
  border: 1px solid rgba(241, 6, 6, 0.81);
    background-color: rgba(220, 17, 1, 0.16);
    box-shadow: 0px 0px 2px #ff0303;
    color: #ff0303;
    text-shadow: 2px 1px #00040a;
  transition:0.5s;
  cursor:pointer;
}

.alert-danger:hover
{
     background-color: rgba(220, 17, 1, 0.33);
  transition:0.5s;
}

.danger
{
      font-size: 18px;
    color: #ff0303;
    text-shadow: none;
}

.alert-simple.alert-primary
{
  border: 1px solid rgba(6, 241, 226, 0.81);
    background-color: rgba(1, 204, 220, 0.16);
    box-shadow: 0px 0px 2px #03fff5;
    color: #03d0ff;
    text-shadow: 2px 1px #00040a;
  transition:0.5s;
  cursor:pointer;
}

.alert-primary:hover{
  background-color: rgba(1, 204, 220, 0.33);
   transition:0.5s;
}

.alertprimary
{
      font-size: 18px;
    color: #03d0ff;
    text-shadow: none;
}

.square_box {
    position: absolute;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
    border-top-left-radius: 45px;
    opacity: 0.302;
}

.square_box.box_three {
    background-image: -moz-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    background-image: -webkit-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    background-image: -ms-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    opacity: 0.059;
    left: -80px;
    top: -60px;
    width: 500px;
    height: 500px;
    border-radius: 45px;
}

.square_box.box_four {
    background-image: -moz-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    background-image: -webkit-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    background-image: -ms-linear-gradient(-90deg, #290a59 0%, #3d57f4 100%);
    opacity: 0.059;
    left: 150px;
    top: -25px;
    width: 550px;
    height: 550px;
    border-radius: 45px;
}

.alert:before {
    content: '';
    position: absolute;
    width: 0;
    height: calc(100% - 44px);
    border-left: 1px solid;
    border-right: 2px solid;
    border-bottom-right-radius: 3px;
    border-top-right-radius: 3px;
    left: 0;
    top: 50%;
    transform: translate(0,-50%);
      height: 20px;
}

.fa-times
{
-webkit-animation: blink-1 2s infinite both;
	        animation: blink-1 2s infinite both;
}


/**
 * ----------------------------------------
 * animation blink-1
 * ----------------------------------------
 */
@-webkit-keyframes blink-1 {
  0%,
  50%,
  100% {
    opacity: 1;
  }
  25%,
  75% {
    opacity: 0;
  }
}
@keyframes blink-1 {
  0%,
  50%,
  100% {
    opacity: 1;
  }
  25%,
  75% {
    opacity: 0;
  }
}

              
            
!

JS

              
                
              
            
!
999px

Console