diff --git a/src/apr.rs b/src/apr.rs
index 6396fbc..0209474 100644
--- a/src/apr.rs
+++ b/src/apr.rs
@@ -52,7 +52,13 @@ impl Apr {
         let mut behaviours: Vec<behaviour::Behaviour> = Vec::new();
         for i in 0..r {
             // white side pawns
-            actors.push(actor::Actor::new(_ctx, "/pawn.png", i, 1, 0));
+            actors.push(actor::Actor::new(
+                _ctx,
+                "/pawn.png",
+                i,
+                1,
+                behaviours.iter().len() as u8,
+            ));
             behaviours.push(behaviour::Behaviour::new(
                 vec![(1, 1)],
                 vec![(1, -1), (-1, -1)],
@@ -60,7 +66,13 @@ impl Apr {
         }
         for i in 0..=1 {
             // white side knights
-            actors.push(actor::Actor::new(_ctx, "/pawn.png", i, 0, 0));
+            actors.push(actor::Actor::new(
+                _ctx,
+                "/pawn.png",
+                i,
+                0,
+                behaviours.iter().len() as u8,
+            ));
             behaviours.push(behaviour::Behaviour::new(
                 vec![(1, 2)],
                 vec![(1, -1), (-1, -1)],
@@ -68,7 +80,13 @@ impl Apr {
         }
         for i in 0..r {
             // black side pawns
-            actors.push(actor::Actor::new(_ctx, "/pawn2.png", i, c - 2, 0));
+            actors.push(actor::Actor::new(
+                _ctx,
+                "/pawn2.png",
+                i,
+                c - 2,
+                behaviours.iter().len() as u8,
+            ));
             behaviours.push(behaviour::Behaviour::new(
                 vec![(1, 1)],
                 vec![(1, 1), (-1, 1)],
@@ -76,7 +94,13 @@ impl Apr {
         }
         for i in 0..=1 {
             // black side knights
-            actors.push(actor::Actor::new(_ctx, "/pawn2.png", i, c - 1, 0));
+            actors.push(actor::Actor::new(
+                _ctx,
+                "/pawn2.png",
+                i,
+                c - 1,
+                behaviours.iter().len() as u8,
+            ));
             behaviours.push(behaviour::Behaviour::new(
                 vec![(1, 2)],
                 vec![(1, 1), (-1, 1)],