function refill()
        for y = 2,16 do
                turtle.select(1)
                if turtle.compareUp() == true do
                turtle.select(y)
                turtle.suckUp()
        end
end funtion


even = false
  for k = 1,13 do
                        for i = 1,23 do
                                if turtle.getItemCount(x) == 0 then
                                        repeat turtle.select(x+1)
                                        x = x + 1
									if x == 15 then
                                        x = 1
									end
								   end

                                turtle.dig()
                                turtle.place()
                                turtle.back()
                        end

                if even== false then
                        turtle.turnRight()
                        turtle.back()
                        turtle.turnRight()
                        even = true

                else if even == true then
                        turtle.turnLeft()
                        turtle.back()
                        turtle.turnLeft()
                        even = false
                   end
			end

		end