just copy in custom html & css

chat.css

@import url(https://fonts.googleapis.com/css?family=Roboto:700);

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    text-shadow: 0 0 1px #000, 0 0 2px #000;
    background: {background_color};
    font-family: 'Roboto';
    font-weight: 700;
    font-size: {font_size};
    line-height: 1.5em;
    color: {text_color};
}

#log>div {
    animation: fadeInUp .3s ease forwards, fadeOutUp 0.3s ease {message_hide_delay} forwards;
    -webkit-animation: fadeInUp .3s ease forwards, fadeOutUp 0.3s ease {message_hide_delay} forwards;
}

.colon {
    display: none;
}

#log {
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    padding: 0 10px 10px;
    width: 100%;
}

#log>div {
    display: block;
}

#log>div.deleted {
    visibility: hidden;
}

#log .emote {
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    padding: 0.4em 0.2em;
    position: relative;
}

#log .emote img {
    display: inline-block;
    height: 1em;
    opacity: 0;
}

#log .message,#log .meta {
    vertical-align: top;
    display: block;
    padding-bottom: 0.1em;
}

#log .meta {
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
  	text-overflow:clip;
}

#log .message {
    word-wrap: break-word;
    width: 100%;
  	padding-left: 1em;
}

.badge {
    display: inline-block;
    margin-left: 0.2em;
    position: relative;
    height: 1em;
    vertical-align: middle;
    top: -0.1em;
}

.name {
    margin-right: 0.2em;
}

chat.html

<!-- item will be appened to this layout -->
<div id="log" class="sl__chat__layout">
</div>

<!-- chat item -->
<script type="text/template" id="chatlist_item">
  <div data-from="{from}" data-id="{messageId}">
    <div class="meta" style="color: {color}">
      <span class="name">{from}</span>
      <span class="badges"></span>
    </div>
    <div class="message">
      {message}
    </div>
  </div>
</script>