diff --git a/.gitignore b/.gitignore
index 9d03705..bc31895 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 /build/
-/wschod
+/librefront
 /perf.data*
 /massif.out*
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index b6016fa..35de745 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,8 +6,11 @@
 
 #include "util.h"
 
-SDL_Window *sdl_window;
-SDL_Renderer *sdl_renderer;
+#include "world.h"
+
+static SDL_Window *sdl_window;
+static SDL_Renderer *sdl_renderer;
+/* static World *world; */
 
 SDL_AppResult
 SDL_AppInit (void **appstate, int argc, char **argv)
@@ -24,6 +27,8 @@ SDL_AppInit (void **appstate, int argc, char **argv)
   SDL_SetAppMetadata ("LibreFront", "0.1",
 		      "https://git.cfpi-fpsi.eu:8443/chopin-interactive/librefront");
 
+  g_info ("Welcome to LibreFront");
+  
   if (!SDL_Init (SDL_INIT_VIDEO))
     {
       g_error ("Couldn't initialize SDL: %s", SDL_GetError ());
@@ -42,6 +47,8 @@ SDL_AppInit (void **appstate, int argc, char **argv)
     {
       g_error ("Couldn't create renderer: %s", SDL_GetError ());
     }
+
+  /* world = World_random (128, 128); */
   
   return SDL_APP_CONTINUE;
 }
@@ -64,7 +71,9 @@ SDL_AppIterate (void *appstate)
 {
   UNUSED (appstate);
 
+  /* World_update (world); */
   SDL_RenderClear (sdl_renderer);
+  /* World_render (world, sdl_renderer); */
   SDL_RenderPresent (sdl_renderer);
   
   return SDL_APP_CONTINUE;
diff --git a/src/world.c b/src/world.c
new file mode 100644
index 0000000..aa0c9c5
--- /dev/null
+++ b/src/world.c
@@ -0,0 +1,65 @@
+#include "world.h"
+
+World *
+World_random (unsigned int width, unsigned int height)
+{
+  World *w = g_new0 (World, 1);
+  w->width = width;
+  w->height = height;
+  w->tiles = g_array_sized_new (FALSE, TRUE, sizeof (MapTile), width * height);
+
+  for (unsigned int i = 0; i < w->tiles->len; ++i)
+    {
+      /* This should actually be allocated on the heap and be a
+	 pointer, because it's gonna be modified a lot. Just change
+	 all the MapTile things in g_array_* functions to MapTile*,
+	 and allocate with g_new0/g_new here. */
+      MapTile mt;
+      mt.terrain_type = rand () > 0.5 ? TERRAIN_FLAT : TERRAIN_HILL;
+      g_array_append_val (w->tiles, mt);
+    }
+  
+  return w;
+}
+
+void
+World_update (World *w)
+{
+  UNUSED (w);
+}
+
+void
+World_render (World *w, SDL_Renderer *renderer)
+{
+  UNUSED (w);
+
+  for (unsigned int y = 0; y < w->height; ++y)
+    {
+      for (unsigned int x = 0; x < w->width; ++x)
+	{
+	  unsigned int i = y * w->width + x;
+          MapTile mt = g_array_index (w->tiles, MapTile, i);
+
+	  switch (mt.terrain_type)
+	    {
+	    case TERRAIN_HILL:
+	      SDL_SetRenderDrawColor (renderer, 255, 0, 0, 255);
+	      break;
+	    default:
+	      SDL_SetRenderDrawColor (renderer, 0, 255, 0, 255);
+	      break;
+	    }
+
+	  /* Very unoptimized --- for now. */
+	  SDL_FRect pixel = {
+	    .x = x,
+	    .y = y,
+	    .w = 1,
+	    .h = 1
+	  };
+	  
+	  SDL_RenderFillRect (renderer, &pixel);
+	}
+    }
+}
+
diff --git a/src/world.h b/src/world.h
new file mode 100644
index 0000000..2a093f8
--- /dev/null
+++ b/src/world.h
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <SDL3/SDL.h>
+#include <glib-2.0/glib.h>
+
+#include "util.h"
+
+typedef enum TerrainType
+  {
+    TERRAIN_FLAT,
+    TERRAIN_HILL,
+    TERRAIN_MOUNTAIN
+  } TerrainType;
+
+typedef enum BuildingType
+  {
+    BUILDING_NONE,
+    BUILDING_PORT,
+    BUILDING_CITY,
+    BUILDING_FORT
+  } BuildingType;
+
+typedef struct MapTile
+{
+  int player_id;
+  TerrainType terrain_type;
+  BuildingType building_type;
+  
+  gboolean is_radiated;
+  gboolean is_defended;
+} MapTile;
+
+typedef struct World
+{
+  unsigned int width, height;
+  GArray *tiles;
+} World;
+
+World *World_random (unsigned int width, unsigned int height);
+void World_update (World *w);
+void World_render (World *w, SDL_Renderer *renderer);