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In this task, you have to modify the red and blue pattern below by removing blue and red tiles. To remove a tile, just click on it.
In total, you have to remove 20 blue tiles and 20 red tiles. Your goal is to follow as precisely as possible the rule written below. You will receive a bonus payment of up to £0.30 that depends on how well you followed the rule.
There is no time limit to complete this task.