local even = false
  for k = 1,13 do
        for i = 1,24 do
            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
  for k = 1,13 do
       for i = 1,19 do
            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