use R-pentomino as default pattern

life/src/main.rs

@@ -4,7 +4,8 @@
 //  * UI widget explaining rules/hotkeys
 //  * Show shadow of piece (same tile, just with alpha transparency)
 //  * Start with an interesting pattern
-//  * UI minimize widgets
+//  * UI minimize widgets (mostly done)
+//      * Indicate to click on the UI
 //  * Add "follow action" that adjusts camera to zoom in/out/move to see everything
 //  * Make click and drag feel better
 //      * Add arrow keys to move around
@@ -1089,11 +1090,16 @@ fn load_meshes(mut cell_assets: ResMut<CellAssets>, mut meshes: ResMut<Assets<Me
 }
 
 fn default_board(mut writer: MessageWriter<Lifecycle>) {
-    (-5..=5).for_each(|x| {
-        (-5..=5).for_each(|y| {
+    // https://playgameoflife.com/lexicon/R-pentomino
+    [
+        (0,0),
+        (0,-1),
+        (-1,0),
+        (0,1),
+        (1,1),
+    ].into_iter().for_each(|(x, y)| {
         writer.write(Lifecycle::Alive(Coordinates { x, y }));
     });
-    });
 }
 
 // TODO: Do not place piece if panning