Schedules an action to be executed after the specified delay (expressed in milliseconds).
Schedules an action to be executed at the specified time.
Schedules an action to be executed periodically, starting after the specified delay (expressed
in milliseconds) and with the interval of period milliseconds between the end of the previous task
and the start of the next one.
Schedules an action to be executed periodically, starting at the specified time and with the
interval of period milliseconds between the end of the previous task and the start of the next one.