fuel = function()
	if turtle.getFuelLevel() == 0 then
		turtle.select(1)
		turtle.refuel()
	end
end

while turtle.detect() ~= true do
	fuel()
	turtle.forward()
end

turtle.dig()
fuel()
turtle.forward()

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

while not turtle.detectDown() do
	fuel()
	turtle.down()
end

fuel()
turtle.turnRight()
turtle.turnRight()

while turtle.detect() ~= true do
	fuel()
	turtle.forward()
end

turtle.transferTo(1,64)