Theme Horse

Thanks,
that’s a good start, this is how it looks
http://www.cerponline.fr/test?preview=true&preview_id=298&preview_nonce=2fa27fc1fa

but for the need of my client, the promo bar needs to have a square shape like in below link in order to be a promo box & not a promo line.
http://www.cerponline.fr/formation-bepecaser-mention-2-roues-bepecaser-moto/

How is this possible in the html code of each page needing this promo box (& not promo bar) ?
thank you very much in advance, it would be precious, it is the call to action leading to a contact form for conversion optimisation in the website.

Kind regards,