draw with notification

extends Node2D


func _ready():
    update()

func _notification(what):
    if what == NOTIFICATION_DRAW:
        draw_line(Vector2(50,50),Vector2(50,200),Color(1,1,1),5)

# or, instead of `_notification`:

func _draw():
    draw_line(Vector2(80,50),Vector2(80,200),Color(1,1,1),5)