This is bdthemes shortcodes ultimate (joomla) Splash Screen example. you can get facility in this shortcode item> Splash Screen Style, Width, Opacity, One Click, URL, Delay, ESC Hotkey, Close, Class, Content.just simply use this shortcode and get Splash Screen Style.
Note: you can use this shortcode article and custom module. for your help we give a example bellow >

Splash Screen Dark Boxed Style

Splash Dark Box Screen Content

But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects,

[splash style="dark-boxed" width="480" opacity="80" onclick="close-bg" delay="0" esc="yes" close="yes"]
<h3>Splash screen dark boxed content</h3>
<p>But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects,</p>
[/splash]