F7x

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F7xF7xF7xF7xF7xF7xF7xF7x
F7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7x
F7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7xF7x
F7xF7xF7xF7xF7xF7xF7xF7x