using functions.php can someone help?

This is what I’m trying to accomplish. I would like to add additional social icons above the author bio. I can remove them by going into the theme options and removing the # from the link box.

I found the author bio section in the parent theme’s function.php. If I add this section of code to the list of other social sites in function.php

if ( '' != of_get_option('g_author_bio_social_pinterest') ) {
			echo "<a href='".esc_url( of_get_option('g_author_bio_social_pinterest') )."'><i class='icon-pinterest'></i></a>\n";
		}

and then add this code to options.php,

$options['g_author_bio_social_pinterest'] = array( "name" => __( "Author Pinterest URL", "duena" ),
							"desc" => __( "Enter Author Pinterest URL", "duena" ),
							"id" => "g_author_bio_social_pinterest",
							"type" => "text",
							"class" => "hidden",
							"std" => "#");

I have to go into the theme options and save the changes (even though I didn’t actually change anything in the options) then when I go to my site, I have the new social icon.

The problem is, I had to add this code to the parent’s theme. How can I use my child theme to accomplish this? I’m pretty sure it has to do with using the functions.php but I’m a php noob and any guide I’ve found online hasn’t help. Can someone provide any assistance please?

Thanks in advance.