Then you get the tire out and put it on the spare, which you do by loosening the nuts.
assitant
Next you have to remove the tire on the ground with a tire iron, which is kind of like a giant screwdriver.  From there, you attach the spare tire and lower the car down.
assistant
How do you change a flat tire to the spare?
user
You need to jack up the car, which you do with a jack.
assistant
And then?
user