Farm

local robot = require("robot")
local term = require("term")

local cyclesRun = 0

function moveForward()
  while not (robot.forward()) do
    os.sleep(1)
  end
end

function pickMove()
  robot.useDown()
  moveForward()
end

function farmRow()
  for i=1, 8 do
    pickMove()
  end
  robot.useDown()
end

function nextRow(row)
  if row % 2 == 1 then
    robot.turnLeft()
    moveForward()
    robot.turnLeft()
  else
    robot.turnRight()
    moveForward()
    robot.turnRight()
  end
end

function farmPatch()
  for i = 1, 7 do
    farmRow()
    nextRow(i)
  end
end

function moveHome()
  for i = 1, 9 do
    moveForward()
  end
  robot.turnLeft()
  for i = 1, 7 do
    moveForward()
  end
end

function dumpItems()
  for i = 1, 16 do
    robot.select(i)
    robot.drop()
  end
  robot.select(1)
end

function farm()
  cyclesRun = cyclesRun + 1
  updateScreen()
  moveForward()
  farmPatch()
  moveHome()
  robot.turnRight()
  dumpItems()
  robot.turnAround()
end

function updateScreen()
  term.clear()
  term.setCursor(1,1)
  term.write("Running cycle " .. cyclesRun)
end

while true do
  farm()
  os.sleep(300)
end