diff --git a/game-of-life-test/gol.gd b/game-of-life-test/gol.gd
index 5882f2b..c643c73 100644
--- a/game-of-life-test/gol.gd
+++ b/game-of-life-test/gol.gd
@@ -1,15 +1,17 @@
 extends Sprite2D
 
-var n: int = 64
+var n: int = 256
 var arr := []
 
 var data_img: Image
 var data_tex: ImageTexture
 
+var gol := GoL.new()
+
 @onready var mat: ShaderMaterial = material as ShaderMaterial
 
 # sim. consts
-var T := 0.1
+var T := 0.01
 var t := 0.0
 
 # Called when the node enters the scene tree for the first time.
@@ -38,7 +40,8 @@ func _process(_delta: float) -> void:
 	t += _delta
 	if t >= T:
 		t = 0.0
-		_game_of_life_step()
+		#_game_of_life_step()
+		arr = gol.step_once(arr, n)  # cpp step
 		_upload_arr()
 
 func _game_of_life_step() -> void: