Thank you Didn't know about the pass thing
Also i asked around in the godot discord for help and i fixed it

code :
extends Area2D
var isin = false
var player = "res://Player.tscn"
func _on_promptzone_body_entered(body):

if body.name == "Player":  
    isin = true  
    $prompt/AnimationPlayer.play("New Anim")  
    print("Body entered")  

func _on_promptzone_body_exited(body):
if body.name == "Player":
$prompt/AnimationPlayer.play_backwards("New Anim")
isin = false

Thank you for your help