1 (16 oz.) can cut green beans
1 (16 oz.) can yellow wax beans
1 (16 oz.) can kidney beans
1 lg. onion, sliced in rings
2 green peppers, sliced in rings and then in half
1 c. brown vinegar
1 c. brown sugar
1/2 c. salad oil
1 tsp. celery seed

Mix ingredients together in large bowl. Let sit 12-24 hours before serving.