You're talking about a for loop.

But what you really want when you want more than one operation or set of instructions to run at a time (Technically they always do, but that's nitty gritty details), look at the blink without delay example. I recently learned how to use it and it's great, I can have the serial monitor update once a second, so that I can actually catch the values being displayed while the something else that uses the same input can update instantly without affecting the other operation.