wither farm pc.lua

--[[USER CONFIG VARIABLES]]

MONITOR_NAME = "monitor_2" --gathered by using a wired modem; alternatively, directly connect the monitor to the computer
WITHER_SPAWN_DELAY = 2 --in seconds
WITHER_HEAD_CLEAR_DELAY = 300 --in seconds
--RELAY LOCATIONS: These must either be adjacent to the computer, or connected to that side of the computer in the world with redstone
SOUL_SAND_RELAY = "bottom" --Replace these sides with whatever side your relays are on that will control each part of construction
HEAD_RELAY = "right"
CLEAR_RELAY = "left"

--[[]]

local monitor = peripheral.wrap(MONITOR_NAME) --Initialize monitor

if not monitor then --Check if monitor is wired, adjacent, or missing
    monitor = peripheral.find("monitor")
    if not monitor then
        error("Monitor not found! Double check peripheral name.")
    end
end

term.clear()
term.setCursorPos(1,1)
term.write("Running!") --Give an output to computer before swapping print output to monitor

term.redirect(monitor)
local switch = false
local eng = {[true] = "ON", [false] = "OFF"} --Used to translate bools to ON/OFF for user readability
local timer = os.startTimer(WITHER_SPAWN_DELAY)
local headsTimer = os.startTimer(0) --set to 0 to immediately clear heads when run, just in case

local function oneThenTwo()
    rs.setOutput(SOUL_SAND_RELAY, true) --Build frame
    os.sleep(1)
    rs.setOutput(SOUL_SAND_RELAY, false)
    os.sleep(.5)
    rs.setOutput(HEAD_RELAY, true) --Build head
    os.sleep(1)
    rs.setOutput(HEAD_RELAY, false)
end

local function clearHeads()
    rs.setOutput(CLEAR_RELAY, true)
    os.sleep(3)
    rs.setOutput(CLEAR_RELAY, false)
end

local function termDraw()
    term.clear()
    term.setCursorPos(1,1)
    write("Wither Farm")
    term.setCursorPos(4, 4)
    write("\n STATUS: " .. eng[switch])
end

function Main() --Event handling and loop
    termDraw()
    while true do
        local e, p = os.pullEvent()
        if e == "timer" and p == timer then
            if switch then
                oneThenTwo()
            end
            timer = os.startTimer(WITHER_SPAWN_DELAY)
        elseif e == "timer" and p == headsTimer then
            if switch then
                clearHeads()
            end
            headsTimer = os.startTimer(WITHER_HEAD_CLEAR_DELAY)
        elseif e == "monitor_touch" then
            switch = not switch
            Main()
        end
    end
end
Main()