How to use "heading" in a sentence

Then they were in, and heading to their favorite machines

When at last they reached the end of the casino and were on the escalators, heading down toward the shopping arcade, Tina said, "What is blackjack blackout?"

She hurried around the desk, banging her hip against one corner, heading for the wall socket as the printer hummed with the production of more hateful words.

As he drove from one residential street to another, steadily heading away from the smoke, working toward a major thoroughfare, Elliot expected to encounter the black van at every intersection.