How can I use SMIL in my project that I explain below?

Hi.

I want to use SMIL hte project I explain in details below:

I want to use SMIL in my project , in the project I want to use 3 pictures in slide show and duration of every picture is 5 seconds and play a music behind slide show , please guide me how can I use SMIL in this project I explained.

Thank you .