Untitled

        top, bottom, = 0, len(matrix)
        left, right = 0, len(matrix[0])
        res = []

        while left < right and top < bottom:
            for i in range(left, right):
                res.append(matrix[top][i])
            top+=1
            for i in range(top, bottom):
                res.append(matrix[i][right - 1])
            right -=1
            # if not (left < right and top < bottom):
            #     break
            if top <= bottom:
                for i in range(right - 1, left - 1, -1):
                    res.append(matrix[bottom - 1][i])
                bottom -=1
            if left <= right:
                for i in range(bottom - 1, top -1, -1):
                    res.append(matrix[i][left])
                left+=1
        return res