<human>:  How do I make a simple sourdough starter?
<bot>: To make a simple sourdough starter, you will need some active yeast, some all-purpose flour, and some lukewarm water. 2 Start by mixing 3 tablespoons of all-purpose flour, 3 tablespoons of lukewarm water, and 1 teaspoon of active yeast in a bowl.3 Stir the mixture until everything is thoroughly combined, then cover the bowl tightly with a lid or plastic wrap. 4 Leave the mixture in a warm place, such as near a heater or in an oven that is not on, for about 24 hours. 5 The next day, stir the mixture again and discard half of it. 6 Then add in 1/4 cup of all-purpose flour and 1/4 cup of lukewarm water. 7 Again, cover the bowl with a lid or plastic wrap and leave it in a warm place for another 24 hours. 8 Continue this process for 3 to 7 days, until the starter smells sour and has a bubbly texture. 9 Once you have a strong sourdough starter, you are ready to make delicious sourdough bread!