Answer:
There are a number of reason why trying to describe it here aren't a good idea:
Heian Shodan and Heian Nidan are often swapped by instructors. Which one is named Shodan in your school would be a guess.
Schools teach different ways of doing the kata. Instructors have their own focus and their own techniques. To guess as to what your instructor is looking for would do a dis-service to your instructor.