godot red circle

extends Node2D

var x = 1

func _ready():

    pass

func _draw():
    #draw_circle(Vector2(50,50),20,Color(255,0,0));
    x=x+10
    var center = Vector2(300, 300)
    var radius = 200
    var angle_from = -4*x
    var angle_to = x
    var color = Color(1.0, 0.0, 0.0)

    draw_circle_arc(center, radius, angle_from, angle_to, color)
    print(x)
    pass

func draw_circle_arc(center, radius, angle_from, angle_to, color):
    var nb_points = 34
    var points_arc = PoolVector2Array()

    for i in range(nb_points + 4):
        var angle_point = deg2rad(angle_from + i * (angle_to-angle_from) / nb_points - 90)
        points_arc.push_back(center + Vector2(cos(angle_point), sin(angle_point)) * radius)

    for index_point in range(nb_points):
        draw_line(points_arc[index_point], points_arc[index_point + 1], color,2)



func _process(delta):
    update()