function refuel()
	for x = 1, 16 do
		turtle.select(x)
		turtle.refuel()
	end
	start()
end

function drop_all()
	for x = 1, 16 do
		turtle.select(x)
		turtle.drop()
	end
	start()
end

function tunnel()
	term.clear()
	term.setCursorPos(1,2)
	term.write("Height:")
	height = read()
	term.setCursorPos(1,3)
	term.write("Length:")
	lenght = read()
	term.clear()
	term.setCursorPos(1,1)
	term.write("tunneling...:")


for y = 1, lenght do
	turtle.dig()
	turtle.forward()

	--up tunnel height
	for x = 1, height - 1 do
		turtle.digUp()
		turtle.up()
	end

	turtle.turnLeft()

	for x = 1, height - 1 do
		turtle.dig()
		turtle.down()
	end
	turtle.dig()

	turtle.turnRight()
	turtle.turnRight()

	for x = 1, height -1 do
		turtle.dig()
		turtle.up()
	end
	turtle.dig()

	turtle.turnLeft()

	for x = 1, height -1 do
		turtle.down()
	end
end
start()
end

function floor()
	slot = 1

	term.clear()
	term.setCursorPos(1,1)
	term.write("Length:")
	lenght = read()

	term.clear()
	term.setCursorPos(1,1)
	term.write("laying floor...:")

for x = 1, lenght do
	turtle.select(slot)
	turtle.digDown()
	turtle.placeDown()

	turtle.dig()
	turtle.forward()

	if turtle.getItemCount() <= 0 then
		if slot == 16 then
			start()
		end
		slot = slot + 1
		turtle.select(slot)
		if turtle.getItemCount() <= 0 then
			start()
		end
	end
end
	start()
end

function torch()
while true do
	torch_amt = turtle.getItemCount(1)
	if torch_amt > 0 then
		for x = 1, 10 do
			turtle.back()
		end
		turtle.select(1)
		turtle.place()
	else
		start()
	end
end
end

function track()
slot = 1
while true do
	track_amt = turtle.getItemCount(slot)
	turtle.back()
	turtle.select(slot)
	turtle.place()
	if track == 0 then
		slot = slot + 1
	end
	if turtle.getItemCount(slot) == 0 then
		start()
	end

end
end

function start()
	term.clear()
	fuel_level = turtle.getFuelLevel()

	term.setCursorPos(1,1)
	write("Fuel Level: "..fuel_level)

	term.setCursorPos(1,3)
	write("Options:")
	term.setCursorPos(2,4)
	write("- refuel")
	term.setCursorPos(2,5)
	write("- tunnel")
	term.setCursorPos(2,6)
	write("- drop_all")
	term.setCursorPos(2,7)
	write("- floor")
	term.setCursorPos(2,8)
	write("- torch")
	term.setCursorPos(2,9)
	write("- track")




	term.setCursorPos(2,12)
	input = read()

	if input == "refuel" then
		refuel()
	else if input == "tunnel" then
		tunnel()
	else if input == "drop_all" then
		drop_all()
	else if input == "floor" then
		floor()
	else if input == "torch" then
		torch()
	else if input == "track" then
		track()
	end
	end
	end
	end
	end
	end
start()
end

start()