Step 1: Use Flower Nail No. 7. Hold decorating bag fitted with tip 7 at 90° angle to nail surface. Pipe a ball and slightly flatten with finger dusted in cornstarch.
Hold decorating bag fitted with tip 101 at 45° angle with the wide end of tip touching the outer edge of the ball. Pipe a row of zigzags for petals. Repeat for 3-4 more rows, each time angling the tip up a little more.