Growtopia sign's source codee.

void updateSign(ENetPeer* peer, int foreground, int x, int y, string text, int background)
{
	PlayerMoving sign;
	sign.packetType = 0x3;
	sign.characterState = 0x0;
	sign.x = x;
	sign.y = y;
	sign.punchX = x;
	sign.punchY = y;
	sign.XSpeed = 0;
	sign.YSpeed = 0;
	sign.netID = -1;
	sign.plantingTree = foreground;
	SendPacketRaw(4, packPlayerMoving(&sign), 56, 0, peer, ENET_PACKET_FLAG_RELIABLE);
	int hmm = 8, wot = text.length(), lol = 0, wut = 5;
	int yeh = hmm + 3 + 1, idk = 15 + wot, lmao = -1, yey = 2; //idk = text_len + 15, wut = type(?), wot = text_len, yey = len of text_len
	int ok = 52 + idk;
	int kek = ok + 4, yup = ok - 8 - idk;
	int thonk = 4, magic = 56, wew = ok + 5 + 4;
	int wow = magic + 4 + 5;
	BYTE* data = new BYTE[kek];
	ENetPacket* p = enet_packet_create(0, wew, ENET_PACKET_FLAG_RELIABLE);
	for (int i = 0; i < kek; i++) data[i] = 0;
	memcpy(data, &wut, thonk);
	memcpy(data + yeh, &hmm, thonk); //read discord
	memcpy(data + yup, &x, 4);
	memcpy(data + yup + 4, &y, 4);
	memcpy(data + 4 + yup + 4, &idk, thonk);
	memcpy(data + magic, &foreground, yey);
	memcpy(data + magic + 2, &background, yey); //p100 fix by the one and only lapada
	memcpy(data + thonk + magic, &lol, thonk);
	memcpy(data + magic + 4 + thonk, &yey, 1);
	memcpy(data + wow, &wot, yey); //data + wow = text_len
	memcpy(data + yey + wow, text.c_str(), wot); //data + text_len_len + text_len_offs = text
	memcpy(data + ok, &lmao, thonk); //end ?
	memcpy(p->data, &thonk, thonk);
	memcpy((char*)p->data + thonk, data, kek); //kek = data_len
	ENetPeer* currentPeer;
	for (currentPeer = server->peers;
		currentPeer < &server->peers[server->peerCount];
		++currentPeer)
	{
		if (currentPeer->state != ENET_PEER_STATE_CONNECTED)
			continue;
		if (isHere(peer, currentPeer)) {
			enet_peer_send(currentPeer, 0, p);
		}
	}
	delete data;
}