Three Bean Salad

Ingredients

• 1/2 c. vinegar
• 1/4 c. Dr. Pepper
• 1/4 c. sugar
• 1/4 c. salad oil
• 1 tsp. salt
• 1/8 tsp. pepper
• 1 (16 oz.) can French-cut green beans
• 1 (16 oz.) can cut yellow wax beans
• 1 (16 oz.) can red kidney beans
• 1 large red onion, sliced thin