To compose in Rondo form, you have to compose at least three different sections of music. Let's label them A, B and C. Now, you must pick a section/episode of music to revisit throughout the piece. Like a refrain. Let's select A. Episode A is going to play at the beginning of the composition and then alternate with the other episodes, eventually ending on episode A again. Therefore, the composition will follow the episode pattern of; A B A C A A good example of a song in Rondo Form is 'Raider's March' from the Indiana Jones movies. Here is a guided video, showing when the episodes change and return: https://www.youtube.com/watch?v=71IJaZeDfss