length = 100
turtle.refuel(16)
for i=1,length,1 do
	while turtle.detect() do
		turtle.dig()
	end

	while turtle.detectUp() do
		turtle.digUp()
		turtle.up()
	end

	while turtle.detectUp() do
		turtle.digUp()
		turtle.down()
		turtle.down()
	end
	turtle.forward()
end