title: how do I change the colour of a row and column of the ellipses in response to the mouse being over one of the ellipses?
body: <ol>
  <li>I've built this sketch on processing where it generates ellipses on the grid. I wanted to know how I would change the color of a row and column when the mouse hovers over it.</li>
  </ol>
  <pre><code>void setup()
  {
    size(400,400);
    noStroke();
    fill(180,50, 50, 100);
  }
   
  void draw()
  {
    background(255);
   
    for (int row=0; row&lt;10; row = row+1)
    {
      for (int col=0; col&lt;10; col = col+1)
      {
        ellipse(20 + col*40, 20 + row*40,30,30);
          if (mousePressed &amp;&amp; (mouseButton == LEFT))
          fill (random (55));
           ellipse(20 + col*40, 20 + row*40,30,30);
        
      }
    }
  }
  </code></pre>