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void setup()
{
size(400,200);
background(255);
smooth();
stroke(1,1,1,125);
noFill();
for(int i=0;i<=width;i+=20)
{
for(int j=0;j<=height;j+=20)
{
strokeWeight(random(6));
ellipse(i,j, 40,40);
}
}
}