diff --git a/data.py b/data.py
index 64288a1..f9f32d3 100644
--- a/data.py
+++ b/data.py
@@ -39,6 +39,7 @@ def initialize_db_tables(filename):
 
 
 def close_db():
+    global conn
     if conn:
         conn.close()
         conn = None
@@ -54,11 +55,6 @@ def open_db(filename=FILENAME):
     return conn
 
 
-def generate_stars(width, height, minimum_distance_between_stars):
-    for x, y in poisson(width, height, minimum_distance_between_stars):
-        yield x, y, round(1 + expovariate(1))
-
-
 def main(filename):
     print('Initializing db file', filename)
     conn = initialize_db_tables(filename)
diff --git a/stars.py b/stars.py
index 5fee24e..f829098 100644
--- a/stars.py
+++ b/stars.py
@@ -18,10 +18,11 @@
 #    along with game.  If not see <http://www.gnu.org/licenses/>.
 #
 from random import randint, expovariate, seed
-import sqlite3
 from poisson import poisson
 
 
+seed(23)
+
 MINIMUM_DISTANCE_BETWEEN_STARS = 160
 WIDTH, HEIGHT = 10240, 7680
 
@@ -38,7 +39,6 @@ def generate_stars(width, height, minimum_distance_between_stars):
 
 def init_db(conn):
     print('Generating star data.')
-    seed(23)
     c = conn.cursor()
     for values in generate_stars(WIDTH, HEIGHT, MINIMUM_DISTANCE_BETWEEN_STARS):
         c.execute('insert into stars values (?, ?, ?)', values)
diff --git a/ui.py b/ui.py
index 11b7723..d212b18 100755
--- a/ui.py
+++ b/ui.py
@@ -32,6 +32,7 @@ class App:
         frame = self.frame = Frame(root, bg='green')
         frame.rowconfigure(0, weight=1)
         frame.columnconfigure(0, weight=1)
+        frame.pack(expand=True, fill=BOTH)
 
         C = self.canvas = Canvas(frame, *canvas_args, **canvas_kw)
 
@@ -63,13 +64,18 @@ data.open_db()
 
 root = Tk()
 app = App(root, bg='black', scrollregion=(0, 0, stars.WIDTH, stars.HEIGHT))
-app.frame.pack(expand=True, fill=BOTH)
 
 for x, y, radius in stars.iter_stars(data.conn):
-    app.canvas.create_oval(
+    star_id = app.canvas.create_oval(
         x - radius, y - radius,
         x + radius, y + radius,
         fill='yellow',
+        outline='yellow',
+        activefill='#550',
+        activeoutline='orange',
+        activewidth=3,
         )
+    app.canvas.tag_bind(star_id, '<Enter>', (lambda event, sid=star_id, x=x, y=y: root.title(f'{x}, {y}')))
 
 app.frame.mainloop()
+data.close_db()