Sweet Bean Salad

1⁄2 cup sugar

3⁄4 cup cider vinegar

1⁄2 cup salad oil

1⁄2 tsp salt

1 red onion chopped

1 can garbanzo beans

1 can kidney beans

1 can green string beans

1 can yellow wax beans

Combine and allow to marinade 8 hours or more before serving.