import pgzrun
import random
WIDTH = 800
HEIGHT = 600

balls=[]

for i in range(100):
x=random.randint(100,WIDTH-100)
y=random.randint(100,HEIGHT-100)
speedx= random.randint(1,5)
speedy=random.randint(1,5)
r=random.randint(5,50)
colorR=random.randint(10,255)
colorG=random.randint(10,255)
colorB=random.randint(10,255)
ball= [x,y,speedx,speedy,r,colorR,colorG,colorB]
balls.append(ball)

def draw():
screen.fill("white")
for ball in balls:
screen.draw.filled_circle((ball[0],ball[1]),ball[4],(ball[5],ball[6],ball[7]))

def update():
for ball in balls:
ball[0]=ball[0]+ball[2]
ball[1]=ball[1]+ball[3]
if ball[0]>WIDTH - ball[4] or ball[0]<ball[4]:
ball[2]=-ball[2]
if ball[1]>HEIGHT-ball[4] or ball[1]<ball[4]:
ball[3]=-ball[3]
pgzrun.go()