像风一样 int xf = (int) random(width); int yf = (int) random(height); int x = (int) random(width); int y = (int) random(height); background(0xFF); while(x != xf || y != yf) { set(x,y,color(0,0,0)); x = max(0, min(x + -1 + (int) random(3), width - 1) ); y = max(0, min(y + -1 + (int) random(3), height - 1) ); }