i recientemente comencé a aprender sobre Python, e hice una fuente simple de 2 bolas en el lienzo que se mueven con la regla del vector 2D. Quiero multiplicar el número de bolas con la lista en Python. aquí es la fuente de eso.

import time
import random
from tkinter import *
import numpy as np
import math
window = Tk()
canvas = Canvas(window,width=600,height=400)
canvas.pack()


canvas.create_rectangle(50,50,550,350)

R = 15
x1 = random.randrange(50+R,550-R)
y1 = random.randrange(50+R,350-R)
x2 = random.randrange(50+R,550-R)
y2 = random.randrange(50+R,350-R)
vx1 = random.randrange(1 , 10)
vy1 = random.randrange(1 , 10)
vx2 = random.randrange(1 , 10)
vy2 = random.randrange(1 , 10)
ntime = 100000
dt = .1


for iter in range(ntime):

    x1 += vx1*dt
    y1 += vy1*dt
    x2 += vx2*dt
    y2 += vy2*dt
    c1 = canvas.create_oval(x1-R,y1-R,x1+R,y1+R,fill="red")
    c2 = canvas.create_oval(x2-R,y2-R,x2+R,y2+R,fill="blue")
    if (x1 > 550-R):
        vx1 = -vx1
    if (x1 < 50+R ):
        vx1 = -vx1
    if (x2 > 550-R):
        vx2 = -vx2
    if (x2 < 50+R ):
        vx2 = -vx2
    if (y1 > 350-R) or (y1 < 50+R):
        vy1 = -vy1
    if (y2 > 350-R) or (y2 < 50+R):
        vy2 = -vy2
    if (x2-x1)**2 + (y2-y1)**2 <= 4*R*R:

        vector1 = np.array([x1,y1])
        vector2 = np.array([x2,y2])
        vvector1 = np.array([vx1,vy1])
        vvector2 = np.array([vx2,vy2])
        nvector = np.array([x2-x1,y2-y1])
        un = (nvector)/((sum(nvector*nvector))**(1/2))
        tvector = np.array([y1-y2,x2-x1])
        ut = tvector/((sum(nvector*nvector))**(1/2))
        vector1midn = sum(vvector1*un)
        vector2midn = sum(vvector2*un)
        vector1midt = sum(vvector1*ut)
        vector2midt = sum(vvector2*ut)
        vector1after = vector2midn*un + vector1midt*ut
        vector2after = vector1midn*un + vector2midt*ut
        vx1 = vector1after[0]
        vy1 = vector1after[1]
        vx2 = vector2after[0]
        vy2 = vector2after[1]



    txt = canvas.create_text(100,30,text=str(iter),font=('consolas', '20', 
'bold'))


    window.update()
    time.sleep(0.002)



    if iter == ntime-1 : break  

    canvas.delete(c1)
    canvas.delete(c2)
    canvas.delete(txt)


window.mainloop()

a pregunta exacta es, ¿cómo cambio c1, c2, arriba, en muchos de ellos sin simplemente escribir cada bola?