Etch A Sketch in python

My submission for the under 500 character game jam. 

488 characters used (including spaces)

Here's the code: 

from pygame import *

r=800

S=999

s=display.set_mode((S,r))

R=50

c="grey"

t=600

o=100

s.fill("red")

[draw.circle(s,c,(i,r-R),R) for i in (R,S-R)]

draw.rect(s,c,Rect(o,o,r,t))

w=0.1

while True:

    k=key.get_pressed()

    S=w if k[K_s] and t<700 else -w if k[K_w] and t>o else 0

    t+=S

    R=w if k[K_d] and r<900 else -w if k[K_a] and r>o else 0

    r+=R
    ([quit() if e.type==QUIT else... for e in event.get()], draw.rect(s,"black",Rect(r,t,2,2)), display.update())