Here's the composition I started in class on Friday 1/20. The mp3 has the rounded binary version followed immediately by the binary one.
Flow chart for compositions:
Phrase A1 – half cadence
Phrase A2 – authentic (full) cadence
Phrase B1 (starts different but fits with A idea) – half cadence

choose:
Phrase B2 –authentic cadence Phrase A2 – authentic (full) cadence
STOP! = rounded binary
STOP?? = binary
or
DC al fine (repeat A1 & A2) = ternary