好多圓

void setup(){size(800,600); smooth(); noLoop(); }void draw(){for(int i=0;i<600;i+=200){for(int j=0;j<800;j+=200){circles_2(j, i);fill(random(255),random(255),random(255),255);int s=200;for(int z=1;z<18;z++) {s-=20;circles_1(j+100,i+100,s);fill(random(255),random(255),random(255),125);}}}}void circles_1(int a, int b,int c){ ellipse(a,b,c,c);}void circles_2(int a,int b){rect(a, b, 300, 300);}