PATTERN STAMP STOOL; changing a section of background

For this task, I had to open up a background and change a section of it using a pattern I had created. I opened up a fashion background and using the magic wand tool, I then clicked on a part of my background which then highlighted the rest of the image with the same colours and tones. I then had to open up another image I was going to use for my pattern, add it to my patterns and then use the pattern stamp tool. I changed the opacity and effect of the pattern stamp and then you could just colour over where the magic wand had selected and it didn't go over the lines which was good.