Write a block that draws a full flower in the middle of the stage.
Write simple custom blocks, or borrow from blocks you have already written, and then use those blocks
draw a flower block. If you can, write blocks of intermediate complexity that
use and are used by other blocks you write.
You might write:
draw flower head with ...
draw stem with length 
but don't feel constrained by this list.
Use several inputs that control aspects of what the flower should look like. You might change the number of petals,
After you've worked on this for a bit, take a moment to look at what other students have done and chat. If you see something nice, spend some time trying to incorporate that design into your program.