diff --git a/data/fosforo.gif b/data/fosforo.gif
new file mode 100644
index 0000000..62a466c
Binary files /dev/null and b/data/fosforo.gif differ
diff --git a/data/gifs.txt b/data/gifs.txt
index 3349884..8e446f8 100644
--- a/data/gifs.txt
+++ b/data/gifs.txt
@@ -9,6 +9,7 @@ end2.gif
 floor.gif
 font.gif
 font2.gif
+fosforo.gif
 gat.gif
 gat2.gif
 intro1.gif
diff --git a/source/jdraw.cpp b/source/jdraw.cpp
index fd99d38..12ac807 100644
--- a/source/jdraw.cpp
+++ b/source/jdraw.cpp
@@ -15,11 +15,15 @@ namespace draw
     SDL_Renderer *sdl_renderer = nullptr; // El renderer de SDL
     SDL_Texture *sdl_texture = nullptr;   // La textura de SDL a la que pintarem la nostra superficie "screen" i que despres volcarem a pantalla
 
+    SDL_Rect dest_rect = {0, 0, 320, 240};
+    static int fullscreen_scale = 1;
+
     static int screen_zoom = 1;
     static bool screen_fullscreen = false;
     static int screen_width = 320;
     static int screen_height = 240;
     std::string screen_title = "";
+    static int screen_mode = SCREEN_MODE_NORMAL;
 
     surface *screen = nullptr;      // La superficie screen, que representa la pantalla. Se crea i destrueix internament
     surface *destination = nullptr; // Punter a la actual superficie de destí
@@ -89,8 +93,25 @@ namespace draw
         sdl_renderer = SDL_CreateRenderer(sdl_window, -1, 0);
         sdl_texture = SDL_CreateTexture(sdl_renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, screen_width, screen_height);
 
+        if (screen_fullscreen)        
+        {
+            int w, h;
+            SDL_GetWindowSize(sdl_window, &w, &h);
+            fullscreen_scale = h/screen_height;
+            dest_rect.w = screen_width * fullscreen_scale;
+            dest_rect.h = screen_height * fullscreen_scale;
+            dest_rect.x = (w - dest_rect.w)/2;
+            dest_rect.y = (h - dest_rect.h)/2;
+        }
+        else
+        {
+            dest_rect.x = dest_rect.y = 0;
+            dest_rect.w = screen_width * zoom;
+            dest_rect.h = screen_height * zoom;
+        }
+
         // Establim el tamany "logic", indepndent del tamany de finestra
-        SDL_RenderSetLogicalSize(sdl_renderer, width, height);
+        //SDL_RenderSetLogicalSize(sdl_renderer, width, height);
 
         // Creem la superficie "screen" i la establim com a superficie destinació
         screen = createSurface(width, height);
@@ -152,8 +173,25 @@ namespace draw
         sdl_renderer = SDL_CreateRenderer(sdl_window, -1, 0);
         sdl_texture = SDL_CreateTexture(sdl_renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, screen_width, screen_height);
 
+        if (screen_fullscreen)        
+        {
+            int w, h;
+            SDL_GetWindowSize(sdl_window, &w, &h);
+            fullscreen_scale = h/screen_height;
+            dest_rect.w = screen_width * fullscreen_scale;
+            dest_rect.h = screen_height * fullscreen_scale;
+            dest_rect.x = (w - dest_rect.w)/2;
+            dest_rect.y = (h - dest_rect.h)/2;
+        }
+        else
+        {
+            dest_rect.x = dest_rect.y = 0;
+            dest_rect.w = screen_width * zoom;
+            dest_rect.h = screen_height * zoom;
+        }
+
         // Establim el tamany "logic", indepndent del tamany de finestra
-        SDL_RenderSetLogicalSize(sdl_renderer, screen_width, screen_height);
+        //SDL_RenderSetLogicalSize(sdl_renderer, screen_width, screen_height);
     }
 
     void setZoom(const int value)
@@ -203,6 +241,23 @@ namespace draw
         return screen_zoom;
     }
 
+    void toggleScreenMode()
+    {
+        screen_mode++;
+        if (screen_mode == SCREEN_MODE_NUM_MODES) screen_mode = 0;
+        //reinit();
+    }
+
+    void setScreenMode(const int value)
+    {
+        screen_mode = value;
+    }
+
+    const int getScreenMode()
+    {
+        return screen_mode;
+    }
+
     // Crea una superficie i torna un punter a ella
     surface *createSurface(const uint16_t w, const uint16_t h)
     {
@@ -629,9 +684,35 @@ namespace draw
         // Desbloquejem la textura
         SDL_UnlockTexture(sdl_texture);
 
-        // Pintem la textura a pantalla
-        SDL_RenderCopy(sdl_renderer, sdl_texture, NULL, NULL);
+        if (screen_fullscreen)
+        {
+            SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 255);
+            SDL_RenderClear(sdl_renderer);
+        }
 
+        // Pintem la textura a pantalla
+        SDL_RenderCopy(sdl_renderer, sdl_texture, NULL, &dest_rect);
+
+        if (screen_mode & SCREEN_MODE_SCANLINES)
+        {
+            if (screen_zoom>=3 || screen_fullscreen)
+            {
+                int zoom = screen_fullscreen ? fullscreen_scale : screen_zoom;
+                SDL_SetRenderDrawBlendMode(sdl_renderer, SDL_BLENDMODE_BLEND);
+                for (int y=0; y<screen_height; ++y)
+                {
+                    SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 192);
+                    SDL_RenderDrawLine(sdl_renderer, dest_rect.x, dest_rect.y + y*zoom, dest_rect.x + dest_rect.w, dest_rect.y + y*zoom);
+                    SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 96);
+                    if (zoom>3) SDL_RenderDrawLine(sdl_renderer, dest_rect.x, 1+dest_rect.y + y*zoom, dest_rect.x + dest_rect.w, 1+dest_rect.y + y*zoom);
+                }
+                SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 16);
+                for (int x=0; x<screen_width; ++x)
+                {
+                    SDL_RenderDrawLine(sdl_renderer, dest_rect.x + x*zoom, dest_rect.y, dest_rect.x + x*zoom, dest_rect.y + dest_rect.h);
+                }
+            }
+        }
         // I ho presentem
         SDL_RenderPresent(sdl_renderer);
     }
diff --git a/source/jdraw.h b/source/jdraw.h
index dd3dae4..001c422 100644
--- a/source/jdraw.h
+++ b/source/jdraw.h
@@ -13,6 +13,12 @@
 #define FONT_ZOOM_HORIZONTAL    2
 #define FONT_ZOOM_BOTH          3
 
+#define SCREEN_MODE_NORMAL      0
+#define SCREEN_MODE_SCANLINES   1
+#define SCREEN_MODE_FOSFORO     2
+#define SCREEN_MODE_SCANFOS     3
+#define SCREEN_MODE_NUM_MODES   4
+
 // Unitat per a la gestió dels recursos gràfics i dibuixat en pantalla
 namespace draw
 {
@@ -44,6 +50,10 @@ namespace draw
     const bool getFullscreen();
     const int getZoom();
     
+    void toggleScreenMode();
+    void setScreenMode(const int value);
+    const int getScreenMode();
+
     /// @brief Crea una superficie i torna un punter a ella
     /// @param w ample de la superficie
     /// @param h alt de la superficie
diff --git a/source/m_menu.cpp b/source/m_menu.cpp
index 190544f..1c826ff 100644
--- a/source/m_menu.cpp
+++ b/source/m_menu.cpp
@@ -24,7 +24,7 @@ namespace modules
             if (audio::getCurrentMusic() != "mus_menu.ogg") audio::playMusic("mus_menu.ogg");
             selected_option = OPTION_JUGAR;
             ::game::setUpdateTicks(64);
-            draw::loadPalette("test.gif");
+            //draw::loadPalette("test.gif");
             surf = draw::getSurface("test.gif");
             draw::restorecol(2);
             if (config::isProgoloDesbloquejat()) min_option=0;
diff --git a/source/main.cpp b/source/main.cpp
index d540b93..88f0f4e 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -76,6 +76,15 @@ void loadConfig()
     std::string txt_fullscreen = file::getConfigValue("fullscreen");
     if (txt_fullscreen=="yes") fullscreen = true;
 
+    int screen_mode = SCREEN_MODE_NORMAL;
+    std::string txt_fosforo = file::getConfigValue("fosforo");
+    if (txt_fosforo=="yes") screen_mode |= SCREEN_MODE_FOSFORO;
+
+    std::string txt_scanlines = file::getConfigValue("scanlines");
+    if (txt_scanlines=="yes") screen_mode |= SCREEN_MODE_SCANLINES;
+
+    draw::setScreenMode(screen_mode);
+
     static const char* nomtecles[6] = {"keyup", "keydown", "keyleft", "keyright", "keyjump", "keypick"};
     for (int i=0; i<6; ++i)
     {
@@ -112,7 +121,11 @@ void game::init()
         audio::loadSound("snd_boost.wav");
     }
 
-    draw::loadPalette("test.gif");
+    if (draw::getScreenMode()&SCREEN_MODE_FOSFORO) {
+        draw::loadPalette("fosforo.gif");
+    } else {
+        draw::loadPalette("test.gif");
+    }
 
     if (editor::isDevMode()) {
         current_module = M_GAME;
@@ -139,6 +152,19 @@ bool game::loop()
         fullscreen = draw::getFullscreen();
         file::setConfigValue("fullscreen", fullscreen?"yes":"no");
     }
+    if (input::keyPressed(SDL_SCANCODE_F4)) {
+        draw::toggleScreenMode();
+        const int mode = draw::getScreenMode();
+
+        if (mode&SCREEN_MODE_FOSFORO) {
+            draw::loadPalette("fosforo.gif");
+        } else {
+            draw::loadPalette("test.gif");
+        }
+
+        file::setConfigValue("fosforo", mode&SCREEN_MODE_FOSFORO?"yes":"no");
+        file::setConfigValue("scanlines", mode&SCREEN_MODE_SCANLINES?"yes":"no");
+    }
 
     if (input::keyPressed(SDL_SCANCODE_F12)) {
         draw::reloadAll();