diff --git a/Makefile b/Makefile
index 200ed5a..f3174b7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS=-Wall -O3 -g
 
-OBJS=main.o map.o agent.o
+OBJS=main.o map.o agent.o connection.o
 
 brmlife: $(OBJS)
 	$(CXX) -o $@ $^
diff --git a/agent.h b/agent.h
index af68f63..622363b 100644
--- a/agent.h
+++ b/agent.h
@@ -3,12 +3,15 @@
 
 #include "map.h"
 
+class connection;
+
 class agent {
 public:
 	int id;
 	class tile *tile;
+	class connection &conn;
 
-	agent(int id_, class tile &tile_) : id (id_), tile (&tile_)
+	agent(int id_, class tile &tile_, class connection &conn_) : id (id_), tile (&tile_), conn (conn_)
 	{
 		put_at(tile_);
 	};
diff --git a/connection.cc b/connection.cc
new file mode 100644
index 0000000..3a6f0a4
--- /dev/null
+++ b/connection.cc
@@ -0,0 +1,15 @@
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+
+#include "agent.h"
+#include "connection.h"
+
+void
+connection::senses(char around[4])
+{
+	char buf[1024];
+	snprintf(buf, sizeof(buf), "around %c%c%c%c\n\n", around[0], around[1], around[2], around[3]);
+	write(fd, buf, strlen(buf));
+}
diff --git a/connection.h b/connection.h
new file mode 100644
index 0000000..7d8f9e9
--- /dev/null
+++ b/connection.h
@@ -0,0 +1,17 @@
+#ifndef BRMLIFE__CONNECTION_H
+#define BRMLIFE__CONNECTION_H
+
+#include <cstdio>
+
+#include "map.h"
+
+class connection {
+public:
+	int fd;
+
+	connection(int fd_) : fd(fd_) {}
+
+	void senses(char around[4]);
+};
+
+#endif
diff --git a/main.cc b/main.cc
index b654c35..0b1e456 100644
--- a/main.cc
+++ b/main.cc
@@ -1,8 +1,15 @@
 #include <cstdlib>
 #include <ctime>
 #include <iostream>
+#include <cstring>
+
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
 
 #include "agent.h"
+#include "connection.h"
 #include "map.h"
 
 int
@@ -12,19 +19,40 @@ main(int argc, char *argv[])
 
 	srandom(time(NULL));
 
-	class tile &agentpos = map.tile_at(random() % map.w, random() % map.h);
-	class agent agent(0, agentpos);
+	int lfd = socket(AF_INET, SOCK_STREAM, 0);
+	struct sockaddr_in sin;
+	memset(&sin, 0, sizeof(sin));
+	sin.sin_family = AF_INET;
+	sin.sin_port = htons(27753);
+	sin.sin_addr.s_addr = INADDR_ANY;
+	int optval = 1;
+	setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+	bind(lfd, (struct sockaddr *) &sin, sizeof(sin));
+	listen(lfd, 10);
 
-	map.print_map();
-	std::cout << '\n';
+	int cfd;
+	while ((cfd = accept(lfd, NULL, NULL)) >= 0) {
+		class connection conn(cfd);
+		class tile &agentpos = map.tile_at(random() % map.w, random() % map.h);
+		class agent agent(0, agentpos, conn);
 
-	agent.move_dir(1, 0);
-	map.print_map();
-	std::cout << '\n';
+		while (true) {
+			map.print_map();
+			std::cout << '\n';
 
-	agent.move_dir(0, -1);
-	map.print_map();
-	std::cout << '\n';
+			char around[4] = {
+				agent.tile->tile_in_dir(0, -1).symbol(),
+				agent.tile->tile_in_dir(1, 0).symbol(),
+				agent.tile->tile_in_dir(0, 1).symbol(),
+				agent.tile->tile_in_dir(-1, 0).symbol(),
+			};
+			conn.senses(around);
+
+			usleep(1000000);
+		}
+
+		/* TODO: destroy agent cleanly */
+	}
 
 	return 0;
 }