The offense has four downs to reach the next 'line to gain' (marked by a cone) otherwise the ball is turned over.
The field is 75 yards long (plus two end zones) and is broken into quarters—each 15 yards long, and marked by a cones. These cones mark the 'line to gain'.
The lines-to-gain do not move or change. It is typical that offenses may encounter both first-and-short situations or first-and-long situations.
Last updated: Jan.29.2018