godot_boids/examples/boids/2d/simple/example.gd

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extends Node2D
func _ready() -> void:
for flock in get_children():
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for i in 1000: spawnBoid(flock)
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func spawnBoid(flock: Flock2D) -> void:
var boid: Boid2D = preload("../example_boid.tscn").instantiate()
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var screensize := get_viewport_rect().size
boid.modulate = Color(randf(), randf(), randf(), 1)
boid.global_position = Vector2((randf_range(200, screensize.x - 200)), (randf_range(200, screensize.y - 200)))
flock.add_child(boid)