title: Set fill style and flood fill uses
body: <p>what is the use of set fill style and flood fill</p>
  
  <p>Even if I write color is dark gray then it shows green color,then what is the use of flood fill we can simply write only set fill style ?</p>
  
  <pre><code>setfillstyle(SOLID_FILL, GREEN);
  floodfill(55,58,DARKGRAY);
  </code></pre>
  
  <p>But if I didn't give flood fill then nothing will be displayed, what is the link between setfillstyle and flood fill?</p>