stair

destroy = function()
	turtle.digDown()
	turtle.digUp()
	while turtle.detect() == true do
		turtle.dig()
	end
end

staircase = function(start, fin)
	for i = fin, start, 1
	do
		destroy()
		turtle.forward()
		destroy()
		turtle.down()
	end
	turtle.dig()
end

term.write("Select Starting Y Coord: ")
local Start = read()
term.write("Select Ending Y Coord: ")
local Fin = read()

staircase(Start, Fin)