View difference between Paste ID: NFvVH48Q and UPFE141S

 refill = function()
 	turtle.select(1)
 	if turtle.getFuelLevel()  < 50 then
 		repeat
 			sleep(3)
 			turtle.digUp()
 			turtle.placeUp()
 			turtle.suckUp()
 			turtle.refuel(64)
 			turtle.dropUp()
 			turtle.digUp()
 		until turtle.getFuelLevel() > 50
 	end
 end
 lastempty = function()
 	turtle.digUp()
 	turtle.select(2)
 	turtle.placeUp()
 	for i = 3, 15, 1
 	do
 		turtle.select(i)
 		turtle.dropUp(64)
 	end
 	turtle.select(2)
 	turtle.digUp()
 	turtle.select(1)
 end
 empty = function()
 	if turtle.getItemCount(15) >= 1 then
 		turtle.digUp()
 		turtle.select(2)
 		turtle.placeUp()
 		for i = 3, 15, 1
 		do
 			turtle.select(i)
 			turtle.dropUp(64)
 		end
 		turtle.select(2)
 		turtle.digUp()
 		turtle.select(1)
 	end
 end
 
 destroy = function()
 	empty()
 	turtle.digDown()
 	turtle.digUp()
 	while turtle.detect() == true do
 		turtle.dig()
 	end
 end
 
-staircase = function(start, fin)
+staircasedown = function(start, fin)
 	refill()
 	for i = fin, start, 1
 	do
 		destroy()
 		refill()
 		turtle.forward()
 		destroy()
 		refill()
 		turtle.down()
 	end
 	turtle.dig()
 	lastempty()
 end
 
 staircaseup = function(start, fin)
 	refill()
 	for i = fin, start, 1
 	do
 		destroy()
-staircase(Start, Fin)
+
 		turtle.forward()
 		destroy()
 		refill()
 		turtle.up()
 	end
 	turtle.dig()
 	lastempty()
 end
 
 term.write("Select Starting Y Coord: ")
 local Start = read()
 term.write("Select Ending Y Coord: ")
 local Fin = read()
 
 if Start > Fin then
 	staircasedown(Start, Fin)
 elseif Fin > Start
 	staircaseup(Start, Fin)
 end
 print("Mining Complete")