diff --git a/scenes/Goal.tscn b/scenes/Goal.tscn
index 713136e..2d3d397 100644
--- a/scenes/Goal.tscn
+++ b/scenes/Goal.tscn
@@ -11,6 +11,8 @@ extents = Vector3( 0.584547, 2.22627, 0.659734 )
 
 code = "shader_type spatial;
 
+uniform float PI = 3.1415;
+
 // BILLBOARD_FIXED_Y
 // from: https://github.com/godotengine/godot/blob/master/scene/resources/material.cpp#L552
 void vertex() {
@@ -18,46 +20,47 @@ void vertex() {
 	MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(WORLD_MATRIX[0].xyz),0,0,0),vec4(0,1,0,0),vec4(0,0,length(WORLD_MATRIX[2].xyz),0),vec4(0,0,0,1));
 }
 
-//float atan2(vec2 coords) {
-//	float pi = 3.14;
-//	if (coords.x > 0.0) {
-//		return atan(coords.x, coords.y);
-//	} else if (coords.x < 0.0) {
-//		if (coords.y >= 0.0) {
-//			return atan(coords.x, coords.y) - pi;
-//		} else {
-//			return atan(coords.x, coords.y) + pi;
-//		}
-//	} else if (coords.y > 0.0) {
-//		return pi / 2.0;
-//	} else {
-//		return - pi / 2.0;
-//	}
-//}
+float shine_ray(vec2 center_coords, float time, float offset, float speed) {
+	// atan() is in [-pi, pi[
+	float angle = atan(center_coords.x, center_coords.y) + offset;
+	if (angle > PI) {
+		angle -= 2.0 * PI;
+	}
+	if (angle < -PI) {
+		angle += 2.0 * PI;
+	}
+	float t = mod(-time * speed, 2.0 * PI) - PI; // [-pi, pi[
+	bool on_ray = abs(angle - t) < 0.05;
+	
+	if (!on_ray) {
+		return 0.0;
+	}
+	
+	float max_dist = 0.5; // maximum orthogonal distance from center in a [0,1] rectangle
+	float center_dist = sqrt(pow(center_coords.x, 2) + pow(center_coords.y, 2)) / max_dist;
+	float intensity = 1.0;
+	return clamp((1.0 - center_dist) * intensity, 0.0, 1.0);
+}
 
 void fragment() {
 	ALBEDO = vec3(1.0, 1.0, 0);
 
 	vec2 center_coords = vec2(UV.x - 0.5, UV.y - 0.5);
-	float max_dist = 0.5; // maximum orthogonal distance from center in a [0,1] rectangle
-	// distance from the center, normalized on [0,1]
-	float center_dist = sqrt(pow(center_coords.x, 2) + pow(center_coords.y, 2)) / max_dist;
-	float angle = atan(center_coords.x, center_coords.y);
-	
-	bool on_ray = abs(angle - (sin(TIME) * 3.14)) < 0.1;// * (1.0 - center_dist);
-
-	if (on_ray) {
-		ALPHA = 1.0;
-	} else {
-		ALPHA = max(1.0 - center_dist, 0.0);		
-	}
+	ALPHA = clamp(
+		shine_ray(center_coords, TIME, 0.0, 0.3) +
+		shine_ray(center_coords, TIME, PI, 0.3) +
+		shine_ray(center_coords, TIME, 0.0, 0.5) +
+		shine_ray(center_coords, TIME, PI, 0.4),
+		0.0, 1.0);
 }
 "
+_sections_unfolded = [ "Resource" ]
 
 [sub_resource type="ShaderMaterial" id=3]
 
 render_priority = 0
 shader = SubResource( 2 )
+shader_param/PI = null
 
 [sub_resource type="Gradient" id=4]
 
@@ -158,5 +161,8 @@ frame = 0
 region_enabled = false
 region_rect = Rect2( 0, 0, 0, 0 )
 _sections_unfolded = [ "Animation", "Flags", "Geometry", "LOD", "Pause", "Region", "Transform", "Visibility" ]
+__meta__ = {
+"_edit_lock_": true
+}