For these images, I changed the shutter speed every time I took a photo. For the first photos, I did 1/20 of a second. For the second photos, I did 1/100 of a second. Then, on the last photos, I used 1/200 of a second. 1/20 of a second was the slowest shutter speed, and lead to the background being blurry. While on the other hand, 1/200 of the second was the highest therefore the whole picture was clear.