StairsTop = 0
StairsBottom = 0
Levels = StairsTop - StairsBottom
L = 0

print("So you Want to dig a tunnel?")
print("You have come to the right place.")

print("Please enter your starting level:")
StairsTop = io.read()
print("Please enter what level you would like to stop at:")
StairsBottom = io.read()

function Level
	if turtle.detectDown() = true then
		turtle.digDown()
		turtle.down()
	end
	if turtle.detect() = true then
		turle.dig()
		turtle.forward()
	end
	if turtle.detect() = true then
		turle.dig
	end
	L = L + 1
end


function Fuel
	turtle.getFuelLevel()
	if turtle.getFuelLevel() <= 5 then
		turtle.select(1)
		turtle.refuel()
	end
end

Fuel()

for Levels > L do
	Level()
	Fuel()
end