local sslot = 1
while true do

if turtle.getFuelLevel() > 0 then
	turtle.select(sslot)
if turtle.getItemCount() > 0 then
local details = turtle.getItemDetail()
	if details.name == "Railcraft:track" then
	turtle.forward() then
	turtle.digDown()
	turtle.placeDown()
	local item = turtle.getItemCount(15)
	if item.count > 1 then
	turtle.drop()
	else
	sslot = (sslot%16)+1
	turtle.select(sslot)

	end
else
	sslot = (sslot%16)+1
	turtle.select(sslot)
end
else
	turtle.select(16)
	turtle.refuel(1)
end
	sleep(1)
end