Nice easy one (I'm sure). How would i make this work ? (I am using a USB 6008).
You should share your VI, and not a screenshot. We have no idea what you want to do with that Express VI. I have also a feeling that you do not understand the importance of timing (how much you want to wait between iterations of the FOR loop, etc.).
Attach your VI, and explain what is your actual goal?
-Understand first what is for loop, auto indexing functionality.
-Then if you hover mouse over the error wire is will give the hint why it is broken.
Here you go for learning LabVIEW first:
As mentioned above it is hard to say anything without seeing the DAQ Assistant configuration, but the the screenshot gives some hints.
Assuming that the DAQ Assistant is configured to output a line, inserting a "Build Array" block might help: