local redstone = 1
local rail = 2

term.clear()
term.setCursorPos(1,1)
print("Place Redstone Slot 1 & Rail Slot 2")
print("Enter length:")
local number = tonumber(io.read())

for i=1, n do
	turtle.digDown()
	turtle.down()
	turtle.digDown()

	turtle.select(redstone)
	turtle.placeDown()

	turtle.up()

	turtle.select(rail)
	turtle.placeDown()

	for i=1, 20 do
		turtle.forward()
	end
end