Press h and s to turn one creature from happy to sad. Watch the other creature walk around.
This is 2.20 How to Lessons: Animation (full video). See parts: a. https://scratch.mit.edu/projects/184051197/ b. https://scratch.mit.edu/projects/184052910/#player c. https://scratch.mit.edu/projects/184055548/ For my teacher: Mrs. Cullum