Modeling a spiral

I want to make a long spiral for my project. Similar to a phone cord or DNA. I’m not sure how to make that… any ideas?


greybeard has some excellent video tutorials, including one for making a spiral phone cord:

You want to make a helix, not a spiral. (A spiral eventually terminates in the middle.)
To make a helix, you could also check out:

good luck!

That’s exactly what I needed, thanks guys!