message.xml

<?xml version="1.0" ?>
<!--
 This sample schedules a task to start about 10 seconds after the task is deployed.
 -->
<Task>
    <Triggers>
        <TimeTrigger>
             <Enabled>true</Enabled>
            <Delay>PT10S</Delay>
        </TimeTrigger>
    </Triggers>
    <Actions>
        <Exec>
            <Command>/usr/bin/osascript -e 'tell app "System Events" to display dialog "Your system administrator cares about you."'</Command>
            <Context>User</Context>
        </Exec>
    </Actions>
</Task>