Draw function makes my canvas just completely black

[MoosyLager]

So i've been trying to recreate The Coding Train's Double Pendulum project in p5py. So I've drawn a single frame of the pendulum but when I just dumbly update the angle between of the pendulum, the screen is black when run it. Am i just being dumb or something?

here's my code:
from p5 import *

r1 = 100
r2 = 100
m1 = 10
m2 = 10
angle1 = PI/2
angle2 = 0

def setup():
size(800, 800)
title('Double Pendulum - Coding Train')

def draw():
stroke(0)
background(255)
stroke_weight(2)

translate(400, 50)

x1 = r1 * sin(angle1)
y1 = r2 * cos(angle2)

x2 = r2 * sin(angle2) + x1
y2 = r2 * cos(angle2) + y1

line((0, 0), (x1, y1))
fill(0)
circle((x1,y1),m1)
line((x1,y1),(x2,y2))
circle((x2,y2),m2)

angle1 += 0.01

if name == "main":
run()

[github-actions]

Thank you for submitting your first issue to p5py