diff --git a/.gitignore b/.gitignore
index ecbd5d5..870e824 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,7 @@ linux-packages
 .kdev4
 
 windows\-installer/*.bmp
+
+game-resources
+motor
+sc-includes
diff --git a/src/client/client.cpp b/src/client/client.cpp
index abf935b..854c188 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -24,6 +24,13 @@ namespace games {
 		{ NULL, NULL, 0 }
 	};
 
+	void Client::add_line(AbstractLine const & line){
+		lines.push_back(line);
+		for(auto & l : line.calculate_lines()){
+			sim.lines.push_back(l);
+		}
+	}
+
 	bool Client::has_ended(){
 		return false;
 	}
@@ -31,7 +38,13 @@ namespace games {
 	Client::Client(int window_width_, int window_height_, std::shared_ptr<Base>& active_base_)
 	: Base(window_width_, window_height_, active_base_)
 	{
-		// *** websockets code ***
+		// simulation
+		beat.notes.emplace_back(note_type::kQuarterNote, note_info{100.0f, 100.0f});
+
+		AbstractLine line(Vec2{50.0f, 100.0f}, Vec2{150.0f, 200.0f}, simulation::kOneWay);
+		add_line(line);
+
+		// websockets
 		lws_context_creation_info info;
 		memset(&info, 0, sizeof info);
 
@@ -46,8 +59,8 @@ namespace games {
 		std::string address = "127.0.0.1";
 		wsi = libwebsocket_client_connect(context, address.c_str(), 7681, false, "/", address.c_str(), "origin", "uberclient", -1);
 		assert(wsi);
-		// *** ***
 
+		// motor
 		{
 			motor::DirectionalLight p{motor::Position{0, 0, 20}, 1.0f, motor::Color{1, 1, 1, 1}};
 			scene->add(std::make_shared<motor::DirectionalLight>(p));
@@ -85,11 +98,22 @@ namespace games {
 	}
 
 	void Client::update(float const dt, Input input){
+		// motor
 		Base::update(dt, input);
 		handle_input(dt, input);
 
 		scene->camera.set_position({0, 0, 20});
 
+		// simulation
+		for(auto x : sim.update(dt)){
+			std::cout << "plop\n";
+		}
+
+		for(auto n : beat.update(dt)){
+			sim.balls.emplace_back(n.x, n.y, 0, 0, balluid++);
+		}
+
+		// websockets
 		const float poll_interval = 5.0;
 		poll_time += dt;
 
diff --git a/src/client/client.hpp b/src/client/client.hpp
index e83e842..1bb82db 100644
--- a/src/client/client.hpp
+++ b/src/client/client.hpp
@@ -8,14 +8,28 @@
 #include "../Base.hpp"
 #include "../input.hpp"
 
+#include "../../../beats-server/src/app_common.h"
+
 
 namespace games {
 	struct Client : public Base {
 		static constexpr char bundle_name[] = "client";
+
+		// websocket part
 		libwebsocket_context * context{nullptr};
 		libwebsocket * wsi{nullptr};
 		float poll_time{0.0};
 
+		// simulation part
+		int balluid{0};
+		std::vector<AbstractLine> lines;
+
+		simu_type sim;
+		beat_type beat;
+
+		void add_line(AbstractLine const & line);
+
+		// Base part
 		Client(int window_width, int window_height, std::shared_ptr<Base>& active_base);
 
 		virtual bool has_ended();