Updated Changing the lines (markdown)

Changing-the-lines.md

@@ -17,7 +17,18 @@ This is how our hologram looks like now:
 
 ![Our hologram](http://i.imgur.com/l3QesRi.jpg)
 
-// To continue
+We want to change the last line with a sponge now:
+
+``` java
+hologram.removeLine(hologram.size() - 1); // Remember how arrays work, it's the same here
+hologram.appendItemLine(new ItemStack(Material.SPONGE));
+```
+
+Result:
+
+![Final result](http://i.imgur.com/Br36Poe.jpg)
+
+Use the javadocs to see all the methods. These are just some basic ones.
 
 **Notes:**
 * Indexes start from 0, as in normal arrays.