 Voters will decide this fall whether to keep Maine's current flag featuring the state seal on a blue background or revert back to the original version, often referred to as the pine tree flag. That design from 1901, which features a green pine tree and a blue star against a buff background, has exploded in popularity over the past few years. But with so many subtle variations out there, Secretary of State Shanna Bellows launched a design contest last month asking Mainers to submit their proposals.