View difference between Paste ID: QRRD1d7g and R9h37KZa

 local wi = peripheral.find("WorldInterface")
 
 local function printerCount()
   local h = wi.getBlockDatatags(-584,29,123)
   if h.datatags.id~="ccprinter" then
     error("Missing printer in coords -584,29,123",0)
     exit()
   end
   if #h.datatags.Items>=13 then
     --tous les slots sont occupés
     return 6
   elseif #h.datatags.Items==0 then
     --tous les slots sont vides
     return 0
   else
     local count,_,s = 0
     for _,s in pairs(h.datatags.Items) do
       if s.Slot >= 7 then
         count = count+1
       end
     end
     return count
   end
 end
 
 local function hopperCount()
   local h = wi.getBlockDatatags(-584,28,123)
   if h.datatags.id~="Hopper" then
     error("Missing hopper in coords -584,28,123",0)
     exit()
   end
   return #h.datatags.Items
 end
 
 local function printTickets()
   local count,i = 0
   while count < 5 do
     count = hopperCount()
     if count < 5 then
       for i=1,5-count do
         shell.run("/ticket")
       end
     end
   end
 end
 
 local e,p
 local countdown = 0
 local batch = os.startTimer(.1)
 local tick = os.startTimer(1)
 while true do
   term.setCursorPos(1,1)
   term.clear()
   term.write("Countdown: "..countdown)
 
   e,p = os.pullEvent("timer")
   if e=="timer" and p==batch then
     os.cancelTimer(tick)
     if printerCount()<6 then
       printTickets()
       countdown = 10
     else
       countdown = 40
     end
     batch = os.startTimer(countdown)
     tick = os.startTimer(1)
   elseif e=="timer" and p==tick then
     countdown = math.max(0,countdown-1)
     tick = os.startTimer(1)
   end
 end