diff --git a/maps/abyss.tscn b/maps/abyss.tscn
index cb3704f..28d6ffa 100644
--- a/maps/abyss.tscn
+++ b/maps/abyss.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=24 format=2]
+[gd_scene load_steps=26 format=2]
 
 [ext_resource path="res://maps/map.gd" type="Script" id=1]
 [ext_resource path="res://objects/hud/hud.tscn" type="PackedScene" id=2]
@@ -11,6 +11,8 @@
 [ext_resource path="res://objects/environment/ladder/ladder.tscn" type="PackedScene" id=9]
 [ext_resource path="res://graphics/particles/bubble.png" type="Texture" id=10]
 [ext_resource path="res://objects/enemy/mine.tscn" type="PackedScene" id=11]
+[ext_resource path="res://scripts/random_spawner.gd" type="Script" id=12]
+[ext_resource path="res://objects/environment/bubble/bubble.tscn" type="PackedScene" id=13]
 
 [sub_resource type="CanvasItemMaterial" id=12]
 blend_mode = 3
@@ -34,10 +36,11 @@ float rand(float co){
 
 void vertex() {
 	VERTEX.x /= frames;
+	VERTEX.y /= 2.0;
 }
 
 void fragment() {
-	COLOR = texture(TEXTURE, vec2(UV.x / frames + COLOR.r, UV.y));
+	COLOR = texture(TEXTURE, vec2(UV.x / frames + COLOR.r, UV.y / 2.0));
 }"
 
 [sub_resource type="ShaderMaterial" id=10]
@@ -163,6 +166,7 @@ margin_bottom = 384.0
 color = Color( 0.054902, 0.0666667, 0.329412, 1 )
 
 [node name="Bubbles" type="CPUParticles2D" parent="EffectLayer"]
+visible = false
 material = SubResource( 10 )
 position = Vector2( 128, 200 )
 lifetime = 13.0
@@ -228,3 +232,10 @@ position = Vector2( 144, 24 )
 
 [node name="Mine4" parent="Enemies/Mines" instance=ExtResource( 11 )]
 position = Vector2( 72, 48 )
+
+[node name="BubbleSpawner" type="Node2D" parent="."]
+position = Vector2( 0, 584 )
+script = ExtResource( 12 )
+scene = ExtResource( 13 )
+extents = Rect2( 0, 0, 256, 8 )
+delay = 0.2
diff --git a/scripts/random_spawner.gd b/scripts/random_spawner.gd
new file mode 100644
index 0000000..01288dc
--- /dev/null
+++ b/scripts/random_spawner.gd
@@ -0,0 +1,25 @@
+tool
+extends Node2D
+
+export (PackedScene) var scene
+export (Rect2) var extents setget _set_extents
+export var delay = 1.0
+
+func _ready():
+	if !Engine.editor_hint:
+		get_tree().create_timer(delay, false).connect("timeout", self, "spawn")
+
+func spawn():
+	var node = scene.instance()
+	node.position.x = rand_range(extents.position.x, extents.end.x)
+	node.position.y = rand_range(extents.position.y, extents.end.y)
+	add_child(node)
+	get_tree().create_timer(delay, false).connect("timeout", self, "spawn")
+
+func _draw():
+	if Engine.editor_hint:
+		draw_rect(extents, Color.thistle, false, 1.0)
+
+func _set_extents(value):
+	extents = value
+	update()