What's the best way to do a welcome message?

onNewPlayerJoin
>set "just joined" bool on the player
when creating the player's blob for spawning, check if just joined,
>send command to player's blob, that renders the welcome message clientside
>set the just join bool false

 

Significantly simpler option (completely untested but should work, with comments)

Code:

//only run on the client, no synced or shared state at all
#define CLIENT_ONLY
//script-local variables
//wont be cleared between games
bool show_message = true;
u32 time_hide_message = 0;
u32 show_time = 30; //seconds

void onInit(CRules@ this)
{
   //set this up once, when the script is initialised
   time_hide_message = Time() + show_time;
}

//logic
//(this could be moved into onrender but that could
// be run more often than we'd like)
void onTick(CRules@ this)
{
   if (!show_message)
   {
     return;
   }

   u32 current_time = Time();
   if (time_hide_message < current_time)
   {
     //you could actually remove the script but I have
     //no idea what happens if you do that on a clientside
     //rules script, this is safer
     show_message = false;
   }
}

//rendering
void onRender(CRules@ this)
{
   if(!show_message)
   {
     return;
   }

   //(do whatever you need to actually show the message here)
}