The run tag will call a sequence method or run a child sequence whenever it activates.

method: A method of the sequence.

sequence: A child sequence that will start.

<sequence id="my_sequence">
   <at t="10">
      <run method="do_magic"/>
   </at>
</sequence>

This must be coupled with code in the form:

instance my_sequence
{
    method do_magic()
    {
        ...
    }
}