Parametric Spirograph

r=90
centerx=150
centery=150
rm=30
for n = 1 to 6
color rgb(int (rand*3)*127, int(rand*3)*127, int(rand*3)*127)
for t = 0 to 6.28 step .002
x=r*sin(t)+centerx
y=r*cos(t)+centery
xm=rm*sin(-t*3*n)+x
ym=rm*cos(-t*3*n)+y
circle xm,ym,1
next t
next n