diff --git a/cat_api.h b/cat_api.h
index 6b6ae1a..c4119cf 100644
--- a/cat_api.h
+++ b/cat_api.h
@@ -133,6 +133,20 @@ void cat_fill(int layer, int visible, int x, int y, int w, int h, unsigned char
 			cat_pixel(layer, visible, cx + x, cy + y, r, g, b);
 }
 
+void cat_wireframe(int layer, int visible, int x, int y, int w, int h, unsigned char r, unsigned char g, unsigned char b)
+{
+	int cx; for (cx = 0; cx < w; cx++)
+	{
+		cat_pixel(layer, visible, x + cx, y, r, g, b);
+		cat_pixel(layer, visible, x + cx, y+h, r, g, b);
+	}
+	int cy; for (cy = 0; cy < h; cy++)
+	{
+		cat_pixel(layer, visible, x, y + cy, r, g, b);
+		cat_pixel(layer, visible, x + w, y + cy, r, g, b);
+	}
+}
+
 /* TODO: cat bresenham */
 
 /* audio... */
diff --git a/etc/cat_beep_slower.wav b/etc/cat_beep_slower.wav
new file mode 100644
index 0000000..65902f7
Binary files /dev/null and b/etc/cat_beep_slower.wav differ
diff --git a/main.c b/main.c
index de9ef82..a52df11 100644
--- a/main.c
+++ b/main.c
@@ -164,6 +164,7 @@ void mouse_up(unsigned char button)
 
 void process_input(void)
 {
+	/* mode switch game or menus */
 	struct cat_event* e = cat_get_event();
 	if (e == NULL) return;
 	if (e->type == QUIT) bye();
@@ -179,7 +180,7 @@ void erase_entity(struct entity* e)
 	/* get sprite info, etc */
 	/* FIXME */
 	if (e->x < 0 || e->y < 0 || e->x >= screen_width || e->y >= screen_height) return;
-	cat_fill(1, 0, e->x, e->y, e->width, e->height, 0, 0, 0);
+	cat_wireframe(1, 0, e->x, e->y, e->width, e->height, 0, 0, 0);
 }
 
 void draw_entity(struct entity* e)
@@ -187,7 +188,7 @@ void draw_entity(struct entity* e)
 	/* get sprite info, etc */
 	/* FIXME */
 	if (e->x < 0 || e->y < 0 || e->x >= screen_width || e->y >= screen_height) return;
-	cat_fill(1, 1, e->x, e->y, e->width, e->height, e->r, e->g, e->b);
+	cat_wireframe(1, 1, e->x, e->y, e->width, e->height, e->r, e->g, e->b);
 	/* if out of bounds do not draw */
 }
 
@@ -236,6 +237,8 @@ void tick(void)
 	printf("tick %d!\n", tick_count++);
 
 	/* code to run every tick goes here */
+	/* something like "for i in fns_to_run_per_tick (linked list) run ->fn()
+	   and somewhere there's an add_fn_to_run_every_tick() thing... or every n ticks... idk */
 	erase_entities();
 	struct entity* p = get_player();
 	if (is_held(' ')) p->ay = -5;
@@ -252,6 +255,7 @@ void game_loop(void)
 {
 	cat_render();
 	process_input();
+	/* mode check for in game or in menu */
 	tick();
 }
 
@@ -261,7 +265,8 @@ int main(int argc, char** argv)
 	cat_create_window(1920, 1080);
 	//cat_play_wav("etc/example.wav");
 	//cat_play_wav("etc/cat_quick.wav");
-	cat_play_wav("etc/cat_beep_box.wav");
+	//cat_play_wav("etc/cat_beep_box.wav");
+	cat_play_wav("etc/cat_beep_slower.wav");
 		/* layer, visibility, x, y, width, height, r, g, b */
 	cat_fill(0, 1, 0, 0, screen_width - 1, screen_height - 1, 132, 155, 132);
 	/* create the player */ add_entity(1, 0, 0, 0, 50, 50, 100, 50, 0, 0, 0, 0, 0);