Updated pattern for boss; trying to get it to spawn bullets.

scenes/enemy_rotater.gd

@@ -0,0 +1,44 @@
+extends Node2D
+
+var enemy_type: String = "horse"
+
+var bullet_scene = preload("res://scenes/boss_bullet.tscn")
+var start_pos = Vector2.ZERO
+var speed = 0
+var tween_speed: float = 1.4
+  
+var exploding = false
+
+var rotate_speed: int = 100
+var shooter_timer_wait_time: float = 0.2
+var spawn_point_count: int = 4
+var spawn_radius = 100
+
+@onready var shoot_timer = $ShootTimer
+@onready var rotater = $Rotater
+@onready var screensize  = get_viewport_rect().size
+
+func _ready():
+  var step = 2 * PI / spawn_point_count
+  
+  for i in range(spawn_point_count):
+    var spawn_point = Node2D.new()
+    var pos = Vector2(spawn_radius, 0).rotated(step * i)
+    spawn_point.position = pos
+    spawn_point.rotation = pos.angle()
+    rotater.add_child(spawn_point)
+    
+  shoot_timer.wait_time = shooter_timer_wait_time
+  shoot_timer.start()
+  
+func _process(delta: float) -> void:
+  var new_rotation = rotater.rotation_degrees + rotate_speed * delta
+  rotater.rotation_degrees - fmod(new_rotation, 360)
+
+func _on_ShootTimer_timeout() -> void:
+  for s in rotater.get_children():
+    var b = bullet_scene.instantiate()
+    get_tree().root.add_child(b)
+    b.position = s.global_position
+    b.rotation = s.global_rotation
+