Enemy AI not following player

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1

Question

i am trying to make a simple AI that follows the player but cant make it do what it wants the enemy just moves away from the player

extends CharacterBody2D

const SPEED = 5
@onready var player_node := get_node("../Player")

func _physics_process(_delta: float) -> void:
	var player_POS = player_node.global_position
	var distance = position.distance_to(player_POS)
	look_at(player_POS)
	if distance > 20:
		velocity = position
	else:
		velocity = Vector2.ZERO
	move_and_slide()
2

What is this line supposed to do?