1. Choose one expression and imagine for a moment what type of sound you would like to create before you play.
2. Pick out a few notes on the keyboard you’d like to begin with.
3. Develop the initial idea for a certain moment.
4. Consider other musical materials such as dynamics, harmonies, and textures.
5. When the idea is matured, so it is ready to finish, think about how you want to close the piece.
6. Practice it until you can play it confidently without stopping.
7. Write the score (not required).
8. Do the same process for the second expression.
9. Play and present the two pieces to friends and see if they can guess what types of expressions you tried to evoke.