serumRefill

mg = peripheral.wrap("left")
rednet.open("right")

local numSerums = 0

function processSerums()
   local serum, state

   for serum=1,numSerums do
      print ("Processing serum #"..tostring(serum))
      turtle.select(serum)
      turtle.drop()
      sleep(1)
      state = mg.get()

      if (state["Full Serum"] == false) then
         repeat
            sleep(25)
            state = mg.get()
         until (state["Full Serum"] == true)
      end

      turtle.suck()
   end
end

function getSerums()
   local serum, flag

   numSerums = 0
   turtle.select(1)

   while turtle.suck() do
      numSerums = numSerums + 1
   end
end

function doWork()
   print ("Getting serums...")
   turtle.turnLeft()
   getSerums()
   turtle.turnRight()
   if (numSerums < 1) then
      print ("Nothing to do!")
      return
   end
   print ("Done")

   print ("Processing serums...")
   processSerums()
   print ("Done")

   print ("Returning serums...")
   turtle.turnRight()
   for serum=1,numSerums do
      turtle.select(serum)
      turtle.drop()
   end
   turtle.turnLeft()
   print ("All done!")
end

while true do
   id, msg, dist = rednet.receive()
   if (msg == "Refill") and ((dist == 4) or (dist == 7)) then
      print ("Start work")
      sleep(1)
      doWork()
      rednet.broadcast("Purify")
   end
end