Andy J. Smith uses this video, originally created for WeCompose, to explore composing melodies.
00:00 Melody
00:42 Composing and developing a Melody
03:55 Developing a Melody by changing intervals
05:27 Developing a Melody through sequencing
07:49 Developing a Melody through retrograde motion
08:38 Developing a melody through inversion
09:06 Combining techniques for developing Melodies
10:40 Imitation with a String Quartet
12:20 Adding or removing notes to develop your Melody
On screen prompts refer to this Glossary of Music Terms:
https://musicintheround.co.uk/resources/glossary-of-music-terms/