we wanted to create an alert that triggers each time when a message is displayed in our splunk cloud instance...
help with this...
Look at the DMC in your cloud stack. You can create alerts there. If you're wanting to get education on how to write alerts and use SPL, I'd recommend talking to Splunk EDU. They have some classes that would be beneficial to you.
messages like when an indexer goes down , some warning messages.
Basically we want to get alerted when a message comes up in our splunk instance.
What kind of message are you wanting to create and Alert for? Can you be more specific.
In the mean time you can watch this video for the Basics on creating Alerts : http://www.splunk.com/view/SP-CAAAGYG
And some reading here : http://docs.splunk.com/Documentation/Splunk/6.4.3/Alert/Aboutalerts.