Dozens of Hess gas stations located across Massachusetts and New England will be disappearing over the next few weeks.By the end of July, the company known by many consumers for its holiday toy trucks and green and white theme will be just a memory.Timelapse video shows transition coming soonHess Corporation sold its retail business last fall for just under $3 billion. The corporation plans to focus on the exploration and production of crude oil and natural gas.Speedway, a Midwest-based chain, purchased the portfolio of 1,200 Hess gas station and convenience stores across the east coast, and began the rebranding process last fall.Speedway began the transition in the southeast this winter and began the conversion in the New York City area in May.The company plans to make the Hess to Speedway transition in Rhode Island and the South Coast of Massachusetts in June.Gas station and convenience stores in the rest of Massachusetts, New Hampshire and eastern New York will change in July.By August, all locations in the Northeast are scheduled to have made the transition.So what happens to the Hess toy trucks that have been an institution for families for years?Hess said last year the trucks will still be sold online.  13414012