For sticky left and right sidebar ads
<style scoped='' type='text/css'>
.fixed-leftSd,.fixed-rightSd{position:fixed;top:60px;width:160px;height:600px;z-index:9999;transform:translateZ(0)}
.fixed-leftSd{left:0}
.fixed-rightSd{right:0}
.close-fixedSd{position:absolute;width:160px;height:15px;line-height:15px;font-size:11px;font-weight:400;top:-15px;left:0;text-align:center;background:#e0e0e0;color:#666;padding:5px 0;cursor:pointer}
@media screen and (max-width:800px){.fixed-leftSd,.fixed-rightSd{display:none;visibility:hidden;}}
</style>
<div class="fixed-leftSd">
<div aria-label="Close Ads" class="close-fixedSd" role="button" tabindex="0" onclick="this.parentElement.style.display="none"">
<b>CLOSE ADS</b>
</div>
<----Enter Ads Code----> Display Ads Responsive Verticle
</div>
<div class="fixed-rightSd">
<div aria-label="Close Ads" class="close-fixedSd" role="button" tabindex="0" onclick="this.parentElement.style.display="none"">
<b>CLOSE ADS</b>
</div>
<----Enter Ads Code----> Display Ads Responsive Verticle
</div>
But the problem is that only 1 ad will be shown until and unless the flarum is reloaded