Want to turn pure milk into yogurt, can you?

You are equivalent to drinking spoiled milk. Bacteria in the air multiply in milk, making milk thick and sour. It's easy to get sick if you drink like this. If you want to make yogurt, you can buy a cup of plain yogurt. Just put 30 grams of yogurt in 500 grams of pure milk as a strain. It's best to put sugar before putting the strains. Then do it in the same way as you. It is best to put it in the refrigerator for 4 hours after molding.