View difference between Paste ID: 3LdteqQc and RLFC3EGd

 local args={...}
 
 local hopSlice = tonumber(args[1]) or 1
 
 local modems = {}
 for k,v in pairs(rs.getSides()) do
 	if peripheral.getType(v)=="modem" then
 		modems[#modems+1] = peripheral.wrap(v)
 	end
 end
 
 local modemColors = {}
 
 local count = 1
-	for i=0,65535,128 * #modems do
+for k,v in pairs(colors) do
-		print("Hopping on channel range " .. i .. " to " .. i+127)
+	if type(v) == "number" then
 		modemColors[count] = v
 		count = count + 1
-				modems[j].open((i + math.floor(65535 / #modems)) % 65535)
+		if count > #modems then break end
 	end
 end
 
 print("Found " .. #modems .. " modem"..(#modems>1 and "s " or " ")..", estimated total hop time is " .. (65535 / (#modems * 128)) * hopSlice .. " seconds.")
 
 local i=0
 local num = 0
 
 local logFile = fs.open("log","a")
 
 function log(s)
 	logFile.writeLine(s)
 end
 
 local space = 65536 / #modems
 
-end
+term.clear()
 term.setBackgroundColor(colors.white)
 
 while true do
 	for i=0,space,128 do -- get the block size
 		local open={}
 
 		print("Hopping block " .. i)
 		for i=i,i+127 do
 			for j=1,#modems do
 				local c = math.floor(i + ((j-1) * space)) % 65535
 				modems[j].open(c)
 				open[c]=j
 			end
 		end
 
 		term.setBackgroundColor(colors.black)
 		term.clear()
 		term.setBackgroundColor(colors.white)
 		term.setCursorPos(1,1)
 
 		local xSize,ySize = term.getSize()
 		for j = 1,512 do
 			if open[j * 128] then
 				term.setBackgroundColor(modemColors[open[j * 128]])
 			end
 
 			io.write(open[j*128] or " ")
 			term.setBackgroundColor(colors.white)
 		end
 
 		os.startTimer(hopSlice)
 		while true do
 			local e,side,recvChan,replyChan,msg,dist = os.pullEvent()
 			if e == "timer" then
 				break
 			elseif e == "modem_message" then
 				log(recvChan .. ":" .. replyChan .. ":"..msg)
 				print("Message on " .. recvChan .. ":" .. replyChan .. ", '"..msg.."'")
 				num = num + 1
 			end
 		end
 		for j=1,#modems do
 			modems[j].closeAll()
 		end
 	end
 
 	print("Round finished, logged " .. num .. " messages, press any key to continue, enter to finish.")
 	if io.read()=="" then break end
 	num = 0
 end
 
 for j=1,#modems do
 	modems[j].closeAll()
 end
 
 logFile.close()