t_direction = "right"

function dig(amount)
	for i=1,amount do
		if turtle.detect() then
			turtle.dig()
		end
		turtle.forward()
	end
end

function dispose()
turtle.select(1)
	for y = 1,16 do
		turtle.select(y)
		turtle.dropUp()
	end
end
function checkFuel()
	if turtle.getFuelLevel() < 400 then
		turtle.select(1)
		turtle.suckDown()
		turtle.refuel()
	end
end
function turnAround(row)
	if row ~= 6 then
	if t_direction == "right" then
		turtle.turnRight()
		turtle.dig()
		turtle.forward()
		turtle.turnRight()
		t_direction = "left"
	else
		turtle.turnLeft()
		turtle.dig()
		turtle.forward()
		turtle.turnLeft()
		t_direction = "right"
	end
	end
end
while true do
sleep(5)
checkFuel()
for r=1,6 do
	if r==2 or r==3 then
		dig(3)
	else
		dig(4)
	end
turnAround(r)
end
turtle.dig()
turtle.forward()
turtle.turnRight()
for d =1,5 do
	turtle.dig()
	turtle.forward()
end
turtle.turnRight()
turtle.dig()
turtle.forward()
dispose()
t_direction = "right"
sleep(20)
end