Cook macaroni according to package directions. Preheat oven to 400. Melt butter in the top of a double boiler. Gradually blend in flour, salt and white and red pepper until smooth. Add milk and cream, stirring constantly. Cook for a few minutes until mixture thickens. Add cheese and continue to heat until cheese is melted and sauce looks smooth. Remove from heat and add macaroni. Add sugar to tomatoes and add to macaroni. Pour mixture into a buttered baking dish and bake until surface browns.