Animate Happy Birthday

This function displays a Flower (actually large size character) and a rotating marque message 'Happy Birthday' with changing colors.

This function displays a Flower (actually large size character) and a rotating marque message 'Happy Birthday' with changing colors. Colors are changed in a while loop. Message and flower can be changed via input arguments. Color change speed can also be modified by changing (t2-t1)/1e7>.25 to like (t2-t1)/1e7>.5 for slower change.
Inspired by:
https://www.mathworks.com/matlabcentral/discussions/highlights/134287-happy-st-patrick-s-day-simple-emoticon-animation-demo.