3 bean salad by Minnie Peters

1 can green beans(drained)
1 can kidney beans(drained)
1 can yellow wax beans(drained)
1/2 cup onions
1/2 cup green peppers
1/2 cup celery
1/2 cup vinegar
1/2 cup oil
3/4 cups sugar
1 tsp salt

Mix all ingredients and let stand in refrigerator overnight. Serve.