Sparks 1.1.3- light mode

Updated to reflect the new "Looks..." in the settings menu.

sparks/student-pages/U1/L1/03-customizing.html

@@ -28,16 +28,13 @@ <h3><strong>Block Size</strong></h3>
 			</ol>
 		</div>
 
-		<h3><strong>Light Mode vs. Dark Mode</strong></h3>
-		<p>Snap<em>!</em> starts off in a "dark mode" by default, which means the backgrounds are a dark gray. Some people prefer dark modes, especially people who work late at night. You can change the background back and forth between dark and light by using the "flat design" setting.</p>
+		<h3><strong>Bright vs. Dark Background</strong></h3>
+		<p>Snap<em>!</em> starts off in a dark mode by default, which means the backgrounds are a dark gray. Some people prefer dark backgrounds, especially people who work late at night. You can change the background using "Looks..."</p>
 		<div class="forYouToDo">
 			<ol start="3">
-				<li>Open the Settings menu, and select "Flat design" (about halfway down the menu).</li>
+				<li>Open the Settings menu, and select "Looks..." (near the top of the menu). There are (at least) two ways to change the look. "Bright theme" makes the background white. "Flat design" removes the slight three-dimensional shading from the blocks.<br />
+                (If you see a seasonal option, those appear on blocks in the yellow "Control" palette.)</li>
 			</ol>
-			<div class="endnote">
-				<a href="#hint-drop" data-toggle="collapse" title="Why is it called &ldquo;flat&rdquo; mode and not &ldquo;light&rdquo; mode?">Why is it called &ldquo;flat&rdquo; mode and not &ldquo;light&rdquo; mode?</a>
-				<div id="hint-drop" class="collapse">Although the background color is the most visible difference, the block shapes are also different.  The normal blocks are shaded to give a three-dimensional look; the flat blocks don't have that shading.  There's no reason there couldn't be dark flat mode or light shaded mode, but fewer modes keep things simpler.</div>
-			</div>
 		</div>
 
 		<div class="learn">In this activity, you learned how change the "look" of Snap<em>!</em>.</div>