Roll fondant 1/8 in. thick on surface lightly dusted with cornstarch. To ensure that panels line up at bottom, make 3 panels at a time; cut a piece 3 1/2 in. high x 14 in. wide for 9 in. cake, cut a piece 3 1/2 in. high x 15 1/2 in. wide for 15 in. cake.
Position pattern at top left corner at a 45° angle using Angle Guide Pattern. Using smallest square Cut-Out, cut squares between lines on pattern at its bottom edge. Remove cut squares.
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