1

turtle.select(1)
turtle.refuel()

turtle.digDown()
turtle.down()

while turtle.detect() == false do
	turtle.forward()
end

while turtle.detect() == true do

	turtle.select(2)

	if turtle.compareDown() == true then
		turtle.turnLeft()
		turtle.dig()
		turtle.forward()
	else
		turtle.dig()
		turtle.forward()
	end

	while turtle.detect() == false do
		turtle.forward()
		turtle.select(2)
		if turtle.compareDown() == true then
			turtle.turnLeft()
			turtle.forward()
		end
	end
end