恩...

void setup(){size(800,600);

background(0);
noLoop();}
void draw()

{for(int i=0;i<400;i++)

{float x,y,lx,ly,c1,c2,c3,c4;// Random rand = new Random();

x = random(0,800);

y = random(0,600);

lx = random(0,100);

ly = random(0,100);

c1 = random(0,255);

c2 = random(0,255);

c3 = random(0,255);

c4 = random(0,100);

fill(c1,c2,c3,c4);

rect(x,y,lx,ly);

}

}