[ICBM] [help please]

term.clear()
term.setCursorPos(1,1)
print("==========================================")
print("		   Skynet Defense Systems		 ")
print("==========================================")
rednet.open("back")
-----------------------------SiloFunction----------------------------
allSilos = {}

function getSilos()
		allSilos = {}
		rednet.broadcast("CheckIn")
		checking = true
		while checking do
				x = nil
				y = nil
				x,y = rednet.receive(2)
				if x ~= nil and y ~= nil then
						table.insert(allSilos, y)
				else
						checking = false
				end
		end
end
---------------------To get the active silos ID's---------------------
while true do
		print("==========================================")
		print("			Launch Interface			  ")
		print("==========================================")
		print("[1] ListSilos")
		print("[2] Launch")
		input = read()
		if input == "1" then
				getSilos()
				term.setCursorPos(1,20)
				print("List of available silos:")
				for _,ID in pairs(allSilos) do
						print("Silo #"..ID.." ready for launch.")
				end
---------------------------Launch Control-----------------------------
				elseif input == "2" then
				print("Enter # of launches.")
				local launches = read()
				print("Location Tracking...")
				print("X:")
				tonumber(read())
				print("Y:")
				tonumber(read())
				print("Z:")
				tonumber(read())

				local lauchCoords = textutils.serialize({"x"== x, "y"== y, "z"== z})
				for i=1,tonumber(launches) do
						for _,silo in pairs(allSilos) do
								rednet.send(tonumber(silo),launchCoords)
								sleep(4)
						end
				end
		end
end

lSide = "back"
masterID = 80
rednet.open("top")

icbm = peripheral.wrap(lSide)

function dowork(launchCoords)
		launchCoords = textutils.unserialize(launchCoords)
		icbm.setTarget(launchCoords["x"],launchCoords["y"],launchCoords["z"])
		icbm.launch()
		sleep(1.5)
end

while true do
		x,y = rednet.receive ()
		if y == "CheckIn" and x == masterID then
				rednet.send(masterID, os.getComputerID())
				print("Sent ready message")
		elseif x == masterID and y ~= "CheckIn" then
				dowork(y)
		end
end