JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.min.js"></script>

<!-- Events List -->
  <div id="eventsList">
    <!-- Events Group -->
      <div class="eventsGroup">
            <div>
              <div class="gridblock">
                <div class="gridblock_inner">
                  Event 1
                </div>
              </div>
              <div class="gridblock sixty">
                <div class="gridblock_inner no_right_margin">
                  Event 2
                </div>
              </div>
            </div>
            <div style="width:66.666667%;float:left;">
              <div class="gridblock onehundred">
                <div class="gridblock_inner">
                  Event 3
                </div>
              </div>
              <div class="gridblock fifty">
                <div class="gridblock_inner">
                  Event 4
                </div>
              </div>
              <div class="gridblock fifty">
                <div class="gridblock_inner">
                  Event 5
                </div>
              </div>
            </div>	
            <div style="width:33.333333%;float:left;">
              <div class="gridblock onehundred twohigh">
                <div class="gridblock_inner no_right_margin doublehigh">
                  Event 6
                </div>
              </div>
            </div>
      </div>
      <!-- Events Group -->
      <div class="eventsGroup">
            <div>
              <div class="gridblock">
                <div class="gridblock_inner">
                  Event 1
                </div>
              </div>
              <div class="gridblock sixty">
                <div class="gridblock_inner no_right_margin">
                  Event 2
                </div>
              </div>
            </div>
            <div style="width:66.666667%;float:left;">
          ...

CSS

.gridblock {
	height: 440px;
	width: 33.333333%;
	display: block;
	float: left;
}

.gridblock_inner {
	background-color: #acacac;
	height: 440px;
	margin-right: 20px;
}

.gridblock_inner.doublehigh {
	height: 900px;
}

.gridblock.sixty {
	width: 66.666667%;
	margin-bottom: 20px;
}

.gridblock.onehundred {
	width: 100%;
	margin-bottom: 20px;
}

.gridblock.fifty {
	width: 50%;
}

.gridblock.twohigh {
	height: 600px;
}

.no_right_margin {
	margin-right: 0;
}

/* Slick Dots */

.slick-dots {
	display: flex;
	margin: 0;
	padding: 0;
	list-style-type: none;
}
	
.slick-dots li {
	margin: 0 0.25rem;
}

.slick-dots button {
	display: block;
	width: 10px;
	height: 10px;
	padding: 0;
	border: none;
	border-radius: 100%;
	background-color: white;
	opacity: 0.9;
	text-indent: -9999px;
}

.slick-dots button:hover {
	cursor: pointer;
}

li.slick-active button {
	background-color: #d4d4d4;
	opacity: 1;
}

/* Events Page - Featured Events Slider */

#eventsList .slick-dots {
	justify-content: center;
	margin-top: 60px;
}

#eventsList .slick-dots button {
	display: block;
	width: 20px;
	height: 20px;
	padding: 0;
	border: none;
	border-radius: 100%;
	background-color: #d4d4d4;
	opacity: 0.9;
	text-indent: -9999px;
	margin-right: 15px !important;
}

#eventsList .slick-dots button:last-child {
	margin-right: 0;
}

#eventsList .slick-dots button:hover {
	cursor: pointer;
}

#eventsList li.slick-active button {
	background-color: #445bff;
	opacity: 1;
}

JavaScript

$(document).ready(function() {
  $('#eventsList').slick({
    dots: true,
    arrows: false,
    infinite: true,
    slidesToShow: 1,
    slidesToScroll: 1
  });
});