Question for mapmaking experts

A question for mapmakers: is it possible to make a script so that if any player captures a certain town, a countdown of 3 days begins until their victory, provided they hold the town. If the town is recaptured during those 3 days, the same script would start for the other player. Additionally, an event needs to be sent at the start of each turn to all players saying that they have n turns left to recapture the town, or to the town's owner — hold the town for n more days to win. Also, a message should be sent to all players immediately when the town is captured, stating that such-and-such player has captured the town. If they hold it for 3 days, they will be declared the winner. In short, the goal is to make it so that holding the target town for 3 days counts as a victory for the player.