This example shows how you can include a Floating Ad banner. The Ad will show 3 sec after the page refresh. You can adjust the size, effect, and many more params and show in the attached screenshot from the Campaign settings
Floating Ad Example for CM Ad-Changer WordPress Plugin
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The CM Ad Changer manages several banner advertising campaigns across multiple WordPress sites simultaneously. As an ad-server, plugin settings manage or restrict the showing of banner ads according to each campaign id parameters. Campaign settings include days of the week, custom ad campaign dates, maximum numbers of impressions or clicks per banner. The ad-server's management console is intuitive and easy to use. View statistic for each campaign on multiple WordPress websites. This plugin is also available in the WordPress Repository