Square blocks

This is a multi player game. 2 to 8 people can play this. Each player will get a turn to play. If player is able to earn a square, s/he will again get a turn. How to earn a square? - Game contains a grid - Players are supposed to tap on an edge of any of the square blocks within the grid - Whoever taps on every 4th edge of the block, earns the block Who wins? - The player who has earned maximum number of blocks How to win? - While it's your turn, you need to make sure that you are not giving a ready to complete square block to other player as a treat