Cucumber Dill Salad

3 cups thinly sliced cucumbers

10 thin slices sweet onion (optional for those that don't like raw onion)

1 Tablespoon fresh minced dill weed (leaf not seeds)

1/2 teaspoon fresh ground pepper

1/2 teaspoon salt

1/4 teaspoon red pepper flakes

1 cup of vinegar

1/4 cup sugar