startup.lua

rednet.open('back')
local monitorScan = {peripheral.find('monitor')}
local speakers = {peripheral.find('speaker')}
local idr = 14

local monitors={}

local monitorList={'6','7'}

for i,v in pairs(monitorScan) do
    local isValid = false
    for ii,vv in pairs(monitorList) do
        if peripheral.getName(v)==('monitor_'..vv) then
            isValid=true
        end
    end
    if isValid then
        table.insert(monitors,v)
    end
end

for i,v in pairs(monitors) do
    v.setTextScale(0.5)
    v.setBackgroundColor(colors.black)
    v.clear()
end

function drawScreen(monitor,image)
    local oldTerm = term.redirect(monitor)
    paintutils.drawImage(image,5,4)
    term.redirect(oldTerm)
end

function playNote(speaker,details)
    speaker.playNote(details[1],details[2])
end

while true do
    local id,data,type=rednet.receive()
    if id == idr and data and type then
        if type == '0' then
            for i,v in pairs(monitors) do
                drawScreen(v,data)
            end
        elseif type == '1' then
            for i,v in pairs(speakers) do
                playNote(v,data)
            end
        end
    end
end