As an alternative to trick-or-treating this Halloween season, the City of Medford is inviting residents to use their creative talents to decorate pumpkins and lanterns, which will be displayed in an around Wright's Pond in illuminated evening showings on Thursday, October 29, and Friday, October 30, from 6 to 8 p.m. To ensure your pumpkin will float, the city recommends decorating a "sugar" or "pie" pumpkin about 6 to 8 inches in size. Larger pumpkins will be placed along the…