You could do this with css only (link to codepen).
Just make sure to change the.clients
class accordingly.
Edit since anonymus pens can’t get embedded:
.clients {
counter-reset: clients;
}
.client {
counter-increment: clients;
}
.client__pos::before {
content: counter(clients);
}
<div class="clients">
<div class="client">
<div class="client__pos"></div>
</div>
<div class="client">
<div class="client__pos"></div>
</div>
<div class="client">
<div class="client__pos"></div>
</div>
</div>