diff --git a/src/Arts.cs b/src/Arts.cs
index 05ced94..1c7a617 100644
--- a/src/Arts.cs
+++ b/src/Arts.cs
@@ -106,7 +106,7 @@ static class Arts
             )
         );
 
-        for (int i = 1; i < Mono.snake_len - 1; i++)
+        for (int i = 1; i < Mono.snake_len; i++)
         {
             float scale = 1.0f;
             if ((int)((Time.Total - Mono.eat_timestamp) * Mono.snake_len / Mono.step_step) == i)
@@ -124,7 +124,7 @@ static class Arts
         }
         // false tail
         if (tailmove.state && snake_t < 1.0f) {
-            int i_tail = Mono.snake_len - 1;
+            int i_tail = Maths.min(Mono.snake_len, Mono.snake.Length - 1);
             Vec3 tail_dir = Vec3.Direction(Mono.snake[i_tail - 1].ToVec3, Mono.snake[i_tail].ToVec3);
             meshes["Segment"].Draw(
                 mat_mono,