Bedrock stairs

-- Initial Fueling
turtle.refuel(1)

-- variable to tell main function when to stop
local o = 1

-- Function to get the fuel level of the robot as a number
fcount = function()
        return turtle.getFuelLevel()
end

-- Move forward, Fuel Check and Refuel function
forwardCheck = function()
	turtle.dig()
	turtle.forward()

	if fcount() < 1 then
		turtle.select(1)
		print ("Attempting to eat my fuel...")
		if turtle.getItemCount(1) < 1 then
		print ("I am out of fuel...")
		o = 0
		end
		turtle.refuel(1)
		turtle.select(2)
	end
end

downCheck = function()
	turtle.digDown()
	turtle.down()

	if fcount() < 1 then
		turtle.select(1)
		print ("Attempting to eat my fuel...")
		if turtle.getItemCount(1) < 1 then
		print ("I am out of fuel...")
		o = 0
		end
		turtle.refuel(1)
		turtle.select(2)
	end
end

-- Checks for bedrock and empty spaces
bedCheck = function()
	turtle.digDown()
	if turtle.detectDown() then
		turtle.digDown()
		if turtle.detectDown() then
			o = 0
		end
	end
end

-- Checks for lack of steps, and places blocks when needed. Uses slot 2 to place blocks
checkNot = function()
	turtle.down()
	if not turtle.detectDown() then
		turtle.select(2)
		turtle.placeDown()
		turtle.select(1)
		turtle.up()
	else
		turtle.up()
	end
end

dig = function()
	turtle.digUp() -- makes sure no block above
	bedCheck() -- digs down
	checkNot() -- makes sure there is solid step
	forwardCheck() -- move forward and digs if needed
end

while o == 1 do
	turtle.turnLeft()
	turtle.dig()
	dig()
	turtle.dig()
	dig()

	turtle.digUp()
	bedCheck()
	checkNot()

	turtle.turnRight() -- after 3 spaces dug, turns right
	turtle.dig()
	forwardCheck() -- moves forward (digs if necessary)
	bedCheck() -- digs down
	downCheck() -- move to next layer of stairs (above by one block)
	bedCheck() -- cleans next layer


	turtle.turnRight() -- turns to start completing next layer
	turtle.dig()
	dig()
	turtle.dig()
	dig()

	turtle.digUp()
	bedCheck()
	checkNot()

	turtle.turnLeft()
	turtle.dig()
	forwardCheck() -- moves forward (digs if necessary)
	bedCheck() -- digs down
	downCheck() -- move to next layer of stairs (above by one block)
	bedCheck() -- cleans next layer
end