Help on a banner for Orange Ads

I'm working on banner for  Orange Ads. I need to add a "close button" and a "auto-close" at the end of banner.

The code i tried to use doesn't work :

if(!this.Fermer_click_cbk) {

function Fermer_click(evt) {

// Début de votre code personnalisé

console.log("Button clicked");

OA.close('bt');   <--- This part was added by me based on Orange ads specs

// Fin de votre code personnalisé

}

$("#dom_overlay_container").on("click", "#Fermer", Fermer_click.bind(this));

this.Fermer_click_cbk = true;

}

I also need to add "OA.close('bt');" on the last of my timeline.

Thanks for your help