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How to crochet a spiral granny square using four colours. To make this in two colours, just simply follow the same pattern but use two strands in one colour, and two strands in your other colour. The order you place them will create different effects.

Written pattern can be found here: http://happyberrycrochet.blogspot.co.uk/2015/10/how-to-crochet-spiral-granny-square.html