I’m looking for a stack that appears when the homepage is opened, then after an adjustable length of time, fades away to reveal an underlying message. The initial page will be a warning to pilots to alert them to a hazard on the runway of a small airstrip (namely, an infestation of deer), then fade to reveal the standard homepage of the airstrip. This warning is not time or date sensitive, but rather would be posted semi-permanently.
If there is a stack (or other means) to accomplish that, please advise.
Thanks so much for your help!