What happens next in this paragraph?

How to make a brick kiln
Decide on your kiln's measurements.
This may be determined by the size of your kiln shelf or how much space you have for a kiln.
Find the wind's direction for your kiln.
Choose from: I. Use the kiln thermometer to determine if the wind is blowing from north or west. The prevailing wind range should be less than 50% or much more. II. Aim at the direction the wind is blowing. Turn your kiln on medium heat to catch any large pieces of rock floating on the top. III. Hold a pressure line and gauge the wind pressure on the kiln shelf until you know how intense it will be. Strip 1-1/4 " large rocks and cut these out. IV. Plan to build the kiln so the wind can enter into it from the top. Put down a layer of dirt in your kiln's location.
IV.