Godot Version
4.2.2.
Question
Hello. Im making a zombie simulator. My zombie is an area2d node with a sprite and collisionshape 2d. It is constantly moving in random directions. I want it to stop moving or continue moving in another direction when it hits a wall. No matter what kind of node the wall is (static body, tileset, area2d) the zombie just moves through the wall . Can you help me? Im very new to Godot so be gente 
This is the code for the moving zombie
extends Area2D
var direction = Vector2()
var distance_travelled = 0
var infected = 0
func _ready():
randomize()
choose_random_direction()
func _process(delta):
infected_check()
if infected == 1:
start_move(delta)
func choose_random_direction():
var items = [Vector2.RIGHT, Vector2.LEFT, Vector2.UP, Vector2.DOWN]
var random_index = randi() % items.size()
direction = items[random_index]
func _on_body_entered(body):
infected = 1
choose_random_direction()
distance_travelled = 0
func _on_area_shape_entered(area_rid, area, area_shape_index, local_shape_index):
infected = 1
func infected_check():
if infected == 0:
$Label.text = “frisk”
elif infected == 1:
$Label.text = “syk”
func start_move(delta):
position += direction * 100 * delta
distance_travelled += direction.length() * 100 * delta
if distance_travelled >= 100:
choose_random_direction()
distance_travelled = 0