1 files changed, 10 insertions, 3 deletions
diff --git a/src/simulation/lattice_rules.js b/src/simulation/lattice_rules.js
index 0f46d0d..db027a3 100644
--- a/src/simulation/lattice_rules.js
+++ b/src/simulation/lattice_rules.js
@@ -30,7 +30,10 @@ export const lattice_rules = {
       .filter(type => type === 'mutable' || type === 'active')
       .length;
     if (num_active_neighbors === 3) {
-      return { world_updates: [{ x, y, from: 'empty', to: 'active' }] };
+      return { world_updates: [{ 
+        x, y, from: 'empty', to: 'active',
+        flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] },
+      }]};
     }
   },
 
@@ -39,10 +42,14 @@ export const lattice_rules = {
       .map(([x, y, cell]) => cell.type)
       .filter(type => type === 'mutable' || type === 'active')
       .length;
+    const die = { world_updates: [{ 
+      x, y, from: 'active', to: 'empty', 
+      flags: { emit: [0, 0, 0, 0, 0, 0, 0, -1] }, 
+    }]};
     if (num_active_neighbors < 2) {
-      return { world_updates: [{ x, y, from: 'active', to: 'empty' }] };
+      return die;
     } else if (num_active_neighbors > 3) {
-      return { world_updates: [{ x, y, from: 'active', to: 'empty' }] };
+      return die;
     }
   },