Update 'writing.html'

writing.html

@@ -45,6 +45,7 @@
     <section class="left">
       <div>
         <img src="images/leeszal1.jpg" class="purple-image">
+        <img src="images/grow.jpg" class="purple-image">
       </div>
     </section>
     <section class="right">
@@ -89,7 +90,7 @@ invite every librarian (librarians of their own library) to garden Leeszaal and
       <div>
         <div>
           <p>
-             <img src="images/howto.jpg" class="purple-image">
+             <img src="images/howto.jpg">
           </p>
           <p>
           </p>