First, cut out 10 5 inch strips and 5 5-1/2 inch strips of the 10mm black washi tape.
Using the 3/4 inch sticker as a template, cut out 15 circles from the 20mm black washi tape.
For the petals, inflate 5 pink balloons about the same size. Starting at the base of a pink balloon, apply a 5-1/2 inch strip of washi tape vertically.
Starting at the base, apply a 5-inch strip at an angle to both sides. The side strips should be approximately 2-1/4 inch from the center strip. Apply a black round sticker to the top of each strip.
Repeat steps for the remaining 4 pink balloons. Form a cluster of petals by applying a small piece of double-sided tape between each balloon. For the center of the blossom, inflate the white balloon and adhere the white balloon to the center of the petal cluster with double-sided tape.