Clear answer

Added a block to clear answer. This helps when testing the answer again to see if it's a certain value, because you have the option to clear it out when you test it multiple times.

You can view a compiled Scratch.swf here - http://s000.tinyupload.com/index.php?file_id=80423542639566561167

check out the "Sensing" and "Stage Sensing" tabs for changes.