inp = 0
local main = 1
if turtle.getItemCount(16) == 0 then
    print("No chest in slot 16")
else
    print("Chest detected")
    chest = turtle.getItemDetail(16)["name"]
end
local function aboutface()
turtle.turnLeft()
turtle.turnLeft()
end

local function placetorch(fag)
    if turtle.getItemCount(fag) > 0 then
        turtle.select(fag)
        turtle.placeDown()
        turtle.select(1)
    else
        print("No torches")
    end
end



local function itemdump(iter)
    if turtle.getItemCount(14) > 0 or main == 0 then
    	turtle.back()
		if (iter%2) == 1 then
			turtle.turnRight()
		else
			turtle.turnLeft()
		end
    local b, t =turtle.inspectDown()
    while t.name ~= chest do
      	if t.name ~= chest then
      	 	turtle.forward()
      	end
      	b,t = turtle.inspectDown()
    end
    for x=1,14 do
    	turtle.select(x)
    	turtle.dropDown()
    end
    turtle.select(1)
    if main > 0 then
   	   aboutface()
   	   while turtle.inspect() == false do
    		turtle.forward()
       end
	firstiter(iter)
    end
   end
end
local function digcheck()
    if turtle.inspect() then
        turtle.dig()
        digcheck()
    else
      turtle.forward()
    end
end

local function dig()
    digcheck()
    turtle.digUp()
	turtle.digDown()
end

local function FirstIter(iter)
   turtle.up()
   if iter == 1 then
      placetorch(16)
   end
   dig()
   turtle.turnRight()
   dig()
end

local function digwall(iter)
   if iter == 1 then
      FirstIter(iter)
   else
      if (iter%2) == 0 then
		 turtle.turnLeft()
		 dig()
         turtle.turnLeft()
		 for x = 1,2 do
		    dig()
		 end
	  else
	     turtle.turnRight()
		 dig()
	     turtle.turnRight()
		 for x = 1,2 do
			dig()
		 end
	  end
   end
end

inp = io.read()
for x = 1,inp do
  digwall(x)
  print(x)
  if (x%7) == 0 then
    placetorch(15)
  end
  itemdump(x)
end
main = 0
itemdump(x)
print("Mining done")