use enemy parent script

objects/enemy/enemy.gd

@@ -0,0 +1,13 @@
+extends Node2D
+
+export var can_be_killed_by_sword = true
+
+func _on_Area2D_area_entered(area):
+	#Kill player
+	if area.is_in_group("player"):
+		area.get_parent().die()
+	#Die from sword
+	if area.is_in_group("sword"):
+		if can_be_killed_by_sword:
+			queue_free()
+

objects/enemy/enemy.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://objects/enemy/enemy.gd" type="Script" id=1]
+
+[node name="Enemy" type="Node2D"]
+script = ExtResource( 1 )

objects/enemy/enemy_move_sidesideupdown.gd

@@ -1,4 +1,4 @@
-extends Node2D
+extends "res://objects/enemy/enemy.gd"
 
 #How far to move
 export var left_up_boundry = 0.0
@@ -9,7 +9,6 @@ export var speed = 50
 #Move horizontal or vertical
 export(int, "Horizontal", "Vertical") var move_direction
 export var flip_sprite = true
-export var can_be_killed_by_sword = true
 #Onreadys
 onready var startpos = position
 onready var sprite = $AnimatedSprite
@@ -40,13 +39,3 @@ func move_up_and_down(delta):
 	if position.y <= startpos.y + (-left_up_boundry * 8): 
 		direction = 1
 		if flip_sprite == true: sprite.scale.y = -1
-
-
-func _on_Area2D_area_entered(area):
-	#Kill player
-	if area.is_in_group("player"):
-		area.get_parent().die()
-	#Die from sword
-	if area.is_in_group("sword"):
-		if can_be_killed_by_sword:
-			queue_free()

objects/enemy/enemy_stationary.gd

@@ -1,12 +1,4 @@
-extends Node2D
+extends "res://objects/enemy/enemy.gd"
 
-export var can_be_killed_by_sword = true
-
-func _on_Area2D_area_entered(area):
-	#Kill player
-	if area.is_in_group("player"):
-		area.get_parent().die()
-	#Die from sword
-	if area.is_in_group("sword"):
-		if can_be_killed_by_sword:
-			queue_free()
+func _process(delta):
+	scale.x = -1