Welcome @harrisautomation
Like Victor suggests, using virtual datapoints will allow you to create mock data that can either raandomly change or increment/decrement or cycle through a select number of values.
Alternatively, if you're needing something that changes based upon the value of something else, then using a meta data sourcing with it's own scripted data points will allow you to update respective values either with a timer or via a trigger of whatever data points are attached to its context.
Have a scout through the forums or refer to the V4 mango docs. If you get stuck with the latter of scripting, there are plenty of resources as well as assistance in this forum
Fox