A design of pink lilies and blue butterflies on a white background for the back cover of an iPhone, in the style of watercolor with soft pastel colors. The composition includes two large pink stargazer lilies at each side of the screen, and three small light-blue butterfly illustrations above them. This artwork has a minimalist aesthetic, featuring clean lines and a tranquil atmosphere. It is presented as a vector illustration with no shadows or text. --ar 4:7  --s 250