mt_farm

local count = 1
local line = 1

turtle.select(1)

local function reset()
 turtle.turnLeft()
 for i = 1, 8 do turtle.forward() end
 turtle.turnLeft()
 for i = 1, 8 do turtle.forward() end

 for i = 16, 2, -1 do
  turtle.select(i)
  turtle.drop()
 end

 turtle.turnLeft()
 turtle.turnLeft()

 count = 1
 line = 1
end

local function Handle()
 local s, d = turtle.inspectDown()

 if (d.metadata == 7) then
  turtle.digDown()
  turtle.suckDown()
 end

 if (turtle.getItemCount() > 0) then
  turtle.placeDown()
 end
end

local function TurnRFR()
 turtle.turnRight()
 turtle.forward()
 turtle.turnRight()
end

local function TurnLFL()
 turtle.turnLeft()
 turtle.forward()
 turtle.turnLeft()
end

local function Info()
 term.clear()
 term.setCursorPos(1, 1)
 print("Farming. Blocks processed: ", count, ". Line: ", line, ".")
end

while true do
 Info()

 if (count == 81) then reset() print("Complete!") break end

 if (count % 9 ~= 0) then
  Handle()
  turtle.forward()
  count = count + 1
 else
  Handle()
  if (line % 2 ~= 0) then TurnRFR()
  else TurnLFL() end
  count = count + 1
  line = line + 1
 end
end