rockfarm.lua

local component = require("component")
local os = require("os")
local robot = require("robot")

local LENGTH = 12
local SLEEP_TIME = 40

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

function replaceStone()
        robot.swingDown()
        robot.placeDown()
end

while true do
        forward()

        --Row 1
        for i=1,LENGTH do
            replaceStone()
            if i ~=LENGTH then forward() end
        end

        --Row 2
        robot.turnRight()
        forward()
        robot.turnRight()
        for i=1,LENGTH/3 do
            replaceStone()
            forward()
            forward()
            replaceStone()
            if i ~= LENGTH/3 then forward() end
        end

        --Row 3
        robot.turnLeft()
        forward()
        robot.turnLeft()
        for i=1,LENGTH do
            replaceStone()
            if i ~= LENGTH then forward() end
        end

        -- Return
        robot.turnLeft()
        for i=1,2 do forward() end
        robot.turnLeft()
        for i=1,LENGTH do forward() end
        robot.turnRight()
        robot.turnRight()

        os.sleep(SLEEP_TIME)
end