diff --git a/Entity.cpp b/Entity.cpp
index f336f27..60edd84 100644
--- a/Entity.cpp
+++ b/Entity.cpp
@@ -10,6 +10,12 @@ Entity::Entity(Vec2 p, Vec2 s, Vec2 a):
 void Entity::Update(){
 	pos = pos + spe + acc/2;
 	spe = spe + acc;
+	if(pos.y >= 1000){
+		spe.y = - spe.y + acc.y;
+	}
+	if(pos.x >= 1920){
+		pos.x = 0;
+	}
 }
 
 void Entity::Debug() const{
@@ -17,3 +23,7 @@ void Entity::Debug() const{
 		<< "spe= (" << spe.x << ", " << spe.y << ")" 
 		<< "acc= (" << acc.x << ", " << acc.y << ")" << std::endl;
 }
+
+Vec2 Entity::GetPos(){
+	return pos;
+}
diff --git a/Entity.h b/Entity.h
index 8c3179f..bc67513 100644
--- a/Entity.h
+++ b/Entity.h
@@ -15,6 +15,8 @@ public:
 	void Debug() const;
 	
 	void Update();
+
+	Vec2 GetPos();
 };
 
 #endif /* ENTITY_H */
diff --git a/Vector.h b/Vector.h
index 802262c..8de9b79 100644
--- a/Vector.h
+++ b/Vector.h
@@ -1,6 +1,7 @@
 #ifndef VECTOR_H
 #define VECTOR_H
 
+
 struct Vec2 
 {
 	int x, y = 0;
@@ -11,6 +12,9 @@ struct Vec2
 	Vec2 operator/ (const int left);
 
 	int norm();
+	
 };
 
+const static Vec2 gravity = {0,10};
+
 #endif /* VECTOR_H */
diff --git a/Window.cpp b/Window.cpp
index 0464fc6..29f7d86 100644
--- a/Window.cpp
+++ b/Window.cpp
@@ -1,29 +1,38 @@
 #include "Window.h"
 #include "ErrorHandler.h"
 #include <SDL2/SDL.h>
+#include <SDL2/SDL_rect.h>
+#include <SDL2/SDL_render.h>
+#include <SDL2/SDL_video.h>
 #include <iostream>
+#include <vector>
 
-void Window::Draw(std::function<bool(Window*)> f){
+void Window::Draw(std::function<bool(Window*)> setup, std::function<bool(Window*)> draw){
+	setup(this);
 	while(Running){
 
-		Running = f(this);
+		SDL_SetRenderDrawColor(ren, 0x00,0x00,0x00,0xff);
 		SDL_RenderClear(ren);
+		Events(draw);
+		draw(this);
 		SDL_RenderPresent(ren);
 
-		Events();
 	}
 }
 
-void Window::Events(){
-	while(SDL_PollEvent(e)){
-		if(e->type == SDL_QUIT){
+void Window::Events(std::function<bool(Window*)> draw){
+	while(SDL_PollEvent(&e)){
+		if(e.type == SDL_QUIT){
 			Running = false;
 		}
-		if(e->type == SDL_KEYDOWN){
-			switch(e->key.keysym.sym){
+		if(e.type == SDL_KEYDOWN){
+			switch(e.key.keysym.sym){
 				case SDLK_a:
 					Running = false;
 					break;
+				case SDLK_s:
+					step = true;
+					break;
 
 			}
 		}
@@ -39,7 +48,7 @@ Window::Window(std::string title, int width, int height)
 		ErrorHandler::send(ErrorType::SDL_ERROR, "SDL_Init");
 	}
 
-	win = SDL_CreateWindow("test", 0,0, width, height, SDL_WINDOW_SHOWN);
+	win = SDL_CreateWindow("test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, SDL_WINDOW_SHOWN | SDL_WINDOW_FULLSCREEN_DESKTOP);
 	if(win == NULL){
 		ErrorHandler::send(ErrorType::SDL_ERROR, "SDL_CreateWindow");
 	}
@@ -59,3 +68,17 @@ Window::~Window(){
 SDL_Renderer* Window::GetRenderer(){
 	return ren;	
 }
+
+void Window::DrawCircle(SDL_Renderer* ren, int x, int y, int r, bool filled){
+	std::vector<SDL_Point> circle;
+	for(int _x = x - r; _x <= x + r; _x++){
+		for(int _y = y - r; _y <= y + r; _y++){
+			int dx = _x - x;
+			int dy = _y - y;
+			if (dx*dx + dy*dy <= r*r){
+				circle.push_back({_x, _y});
+			}
+		}
+	}
+	SDL_RenderDrawPoints(ren, circle.data(), circle.size());
+}
diff --git a/Window.h b/Window.h
index aa18d7e..b0b6937 100644
--- a/Window.h
+++ b/Window.h
@@ -10,18 +10,21 @@ class Window
 private:
 	SDL_Window* win;
 	SDL_Renderer* ren;
-	SDL_Event* e;
+	SDL_Event e;
 
 	bool Running;
 
 public:
 
+	bool step = false;
+
 	Window(std::string title, int width, int height);
 	virtual ~Window();
 
-	void Setup();
-	void Draw(std::function<bool(Window*)> f);
-	void Events();
+	void Draw(std::function<bool(Window*)> setup, std::function<bool(Window*)> draw);
+	void Events(std::function<bool(Window*)> draw);
+
+	void DrawCircle(SDL_Renderer*, int, int, int, bool);
 
 	SDL_Renderer* GetRenderer();
 
diff --git a/main.cpp b/main.cpp
index 5512f31..a958614 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,26 +1,38 @@
 #include "Window.h"
 #include "Entity.h"
+#include <SDL2/SDL_render.h>
 #include <functional>
 #include <SDL2/SDL.h>
 
+Entity* ent;
+
+bool my_setup(Window* win){
+	ent = new Entity({10,10}, {5,0}, {0,2});
+	return true;
+}
+
 bool my_Draw(Window* win){
+
 	SDL_Renderer* ren = win->GetRenderer();
 
+	/* if(win->step){ */
+		ent->Update();
+		win->step = false;
+	/* } */
+	Vec2 ent_pos = ent->GetPos();
+
 	SDL_SetRenderDrawColor(ren, 0xff, 0x00, 0x00, 0x00);
+	win->DrawCircle(ren, ent_pos.x, ent_pos.y, 5, true);
 
 	return true; 
 }
 
 int main(int argc, char *argv[])
 {
-	/* Window win("test", 100, 100); */
-	/* win.Draw(my_Draw); */
+	Window win("test", 100, 100);
+	win.Draw(my_setup, my_Draw);
 
-	Entity t({0, 0}, {1, 1}, {0,0});
-	t.Debug();
-	t.Update();
-	t.Debug();
+	delete ent;
 
-	
 	return 0;
 }
diff --git a/main.h b/main.h
new file mode 100644
index 0000000..e69de29
diff --git a/sim b/sim
deleted file mode 100755
index a900278..0000000
Binary files a/sim and /dev/null differ