Sourdough Bread

Ingredients

• 1 pkg. dry yeast
• 1/2 c. very warm water
• 2 c. lukewarm water
• 1/2 c. sugar
• 1 Tbsp. salt
• 2 c. bread flour
• 1/2 c. sugar
• 1/4 tsp. salt
• 1 1/2 c. warm water
• 1/2 c. corn oil
• 6 c. bread flour