Reducing similar commands
<p>How can I reduce the amount of similar commands into a loop?</p>

<p>Something like</p>

<pre>pictureBox7.BackColor = Color.FromArgb(187, 187, 187);
pictureBox9.BackColor = Color.FromArgb(187, 187, 187);
pictureBox10.BackColor = Color.FromArgb(187, 187, 187);
pictureBox11.BackColor = Color.FromArgb(187, 187, 187);
pictureBox12.BackColor = Color.FromArgb(187, 187, 187);
pictureBox13.BackColor = Color.FromArgb(187, 187, 187);</pre>
