Cartridge code (234 chars):

m=127y=-m
pal(3,4)pal(2,7)::★::srand()cls(0)⧗=t()/8y+=1/8
for i=0,256 do
s=rnd(m)circfill(rnd(m),(rnd(m)-⧗*s)%m,s/120,1+s/60)end
?chr(30),62,100,8+t()*8%2
?chr(26),62,101,7
for x=0,128 do
line(x,y,64,y+m,rnd({13,5,6}))end
flip()goto ★