Let's play spot the difference!
Now a quick tutorial on how to use the cloning tool...
(sorry for the blurred images, I was zoomed in on PHOTO-PAINT so you could tell more what I was doing)
Position the circle so that it is over what you're using to replace the area you intend to alter
Move the circle so that is over the area you intend to alter and left click.
Finally, move the circle around to clone a larger area, but be careful because it will always clone what the cross is over.
And if it wasn't obvious enough from the tutorial, the spot the difference answer is... The electric wires covering the roof of the house have been abolished!!!! I loveeee the cloning tool!