Colorful Bean Salad - cooking recipe

Ingredients

1 (16 oz.) can black beans
2 ears corn, chopped off cob and already cooked
1/2 to 3/4 large can pineapple chunks
3 peppers (1 yellow, 1 green and 1 red), chopped
1/2 medium sweet onion
vinegar and oil

Preparation

Mix beans, corn, pineapple (with some of its juice) and peppers (need not use all the peppers, especially if they are large).
Add vinegar and olive oil to taste.
Salt and pepper optional.