diff --git a/first_2d_game/Mob.gd b/first_2d_game/Mob.gd
new file mode 100644
index 0000000..afd1618
--- /dev/null
+++ b/first_2d_game/Mob.gd
@@ -0,0 +1,16 @@
+extends RigidBody2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	var mob_types = $AnimatedSprite2D.sprite_frames.get_animation_names()
+	$AnimatedSprite2D.play(mob_types[randi() % mob_types.size())
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass
+
+
+func _on_visible_on_screen_notifier_2d_screen_exited():
+	queue_free()
diff --git a/first_2d_game/Mob.tscn b/first_2d_game/Mob.tscn
new file mode 100644
index 0000000..ef218fc
--- /dev/null
+++ b/first_2d_game/Mob.tscn
@@ -0,0 +1,70 @@
+[gd_scene load_steps=10 format=3 uid="uid://df0p8vv7unjvu"]
+
+[ext_resource type="Script" path="res://Mob.gd" id="1_ruw5w"]
+[ext_resource type="Texture2D" uid="uid://c7h0onxpmk5c8" path="res://art/enemyFlyingAlt_1.png" id="1_uocd3"]
+[ext_resource type="Texture2D" uid="uid://cy5gxggbhkygu" path="res://art/enemyFlyingAlt_2.png" id="2_qj0wg"]
+[ext_resource type="Texture2D" uid="uid://c1u4xbef5epal" path="res://art/enemySwimming_1.png" id="3_oyldi"]
+[ext_resource type="Texture2D" uid="uid://d104l5k6mybqh" path="res://art/enemySwimming_2.png" id="4_dfafq"]
+[ext_resource type="Texture2D" uid="uid://db0lge6cm2okp" path="res://art/enemyWalking_1.png" id="5_fig2k"]
+[ext_resource type="Texture2D" uid="uid://wmp167o3rysb" path="res://art/enemyWalking_2.png" id="6_2ax1q"]
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_sy8sf"]
+animations = [{
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("1_uocd3")
+}, {
+"duration": 1.0,
+"texture": ExtResource("2_qj0wg")
+}],
+"loop": true,
+"name": &"fly",
+"speed": 3.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("3_oyldi")
+}, {
+"duration": 1.0,
+"texture": ExtResource("4_dfafq")
+}],
+"loop": true,
+"name": &"swim",
+"speed": 3.0
+}, {
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("5_fig2k")
+}, {
+"duration": 1.0,
+"texture": ExtResource("6_2ax1q")
+}],
+"loop": true,
+"name": &"walk",
+"speed": 3.0
+}]
+
+[sub_resource type="CapsuleShape2D" id="CapsuleShape2D_hklup"]
+radius = 36.0
+height = 96.0
+
+[node name="Mob" type="RigidBody2D"]
+collision_mask = 0
+gravity_scale = 0.0
+script = ExtResource("1_ruw5w")
+metadata/_edit_group_ = true
+
+[node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="."]
+scale = Vector2(0.75, 0.75)
+sprite_frames = SubResource("SpriteFrames_sy8sf")
+animation = &"walk"
+frame = 1
+frame_progress = 0.0804377
+
+[node name="VisibleOnScreenNotifier2D" type="VisibleOnScreenNotifier2D" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+rotation = 1.5708
+shape = SubResource("CapsuleShape2D_hklup")
+
+[connection signal="screen_exited" from="VisibleOnScreenNotifier2D" to="." method="_on_visible_on_screen_notifier_2d_screen_exited"]