diff --git a/lua.cpp b/lua.cpp
index 697572d..9984144 100644
--- a/lua.cpp
+++ b/lua.cpp
@@ -64,7 +64,7 @@ std::string g_pauseFile;
 int g_pauseLine = 0;
 bool function_has_breakpoints = false;
 std::stack<bool> funBreakStack;
-bool debug_enabled = false;
+bool debug_enabled = true;
 
 enum StepMode {
     STEP_NONE,
@@ -2874,20 +2874,9 @@ void lua_call_update() {
     lua_pop(L, 1); // quitar handler
 
     if (status != LUA_OK) {
-        //log_msg(LOG_LUART, "%s\n", lua_tostring(L, -1));
-        //lua_pop(L,1);
         is_playing = false;
-
         lastExceptionMessage = lastExceptionTraceback;
-
-        // Limpiar stack anterior
-        //lastExceptionStack.clear();
-
-        // Parsear traceback en frames
-        //parseLuaTraceback(tb, lastExceptionStack);
-
-        lua_pop(L, 1); // pop traceback y error
-
+        lua_pop(L, 1);
         hasException = true;
 
         if (exceptionFilters.count("all") || exceptionFilters.count("uncaught")) {
@@ -2896,6 +2885,7 @@ void lua_call_update() {
         }
 
         sendLogOutput(lastExceptionMessage);
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Mini Runtime Exception", lastExceptionTraceback.c_str(), NULL);
         return;
     }
 }
diff --git a/main.cpp b/main.cpp
index 5560253..d668b17 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,9 +1,27 @@
 #include "mini.h"
 
+uint16_t ants = 0xc936;
+float t = 0;
+
 void loop() {
-    settrans(255);
-    setcolor(0,0xff0000);
-    const int w=scrw();
-    const int h=scrh();
-    rect(0,0,w-1,h-1,0);
+    //if (t==0) t= time();
+    if (time()-t > 0.25) {
+        t = time();
+        clip();
+        origin(0,0);
+        setdest(0);
+        settrans(255);
+        setcolor(0,0xffffff00);
+        setcolor(1,0xff000000);
+        const int w=scrw();
+        const int h=scrh();
+        set_draw_mode(0);
+        rect(0,0,w,h,1);
+        rect(1,1,w-2,h-2,1);
+        set_draw_mode(1);
+        fillp(ants);
+        rect(0,0,w,h,0);
+        rect(1,1,w-2,h-2,0);
+        ants = (ants<<12) | (ants>>4);
+    }
 }
\ No newline at end of file
diff --git a/mini.cpp b/mini.cpp
index dc6fc5b..829634c 100644
--- a/mini.cpp
+++ b/mini.cpp
@@ -568,7 +568,7 @@ void createDisplay() {
     if (screen_zoom <= 0) screen_zoom = 1;
     while (screen_width*screen_zoom > desktop_width || screen_height*screen_zoom > desktop_height) screen_zoom--;
 
-    mini_win = SDL_CreateWindow(window_title, screen_width*screen_zoom, screen_height*screen_zoom, SDL_WINDOW_OPENGL|(screen_fullscreen?SDL_WINDOW_FULLSCREEN:0));
+    mini_win = SDL_CreateWindow(window_title, screen_width*screen_zoom, screen_height*screen_zoom, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE|(screen_fullscreen?SDL_WINDOW_FULLSCREEN:0));
     windowID = SDL_GetWindowID(mini_win);
     SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengl");
     mini_ren = SDL_CreateRenderer(mini_win, NULL);