What are the energy changes in a spring oscillation?

[malsch]

Homework Statement

I have to provide four energy changes taking place in the following diagram, where the spring is oscillating.

The Attempt at a Solution

I know there is elastic potential energy and kinetic energy involved but i would be happier to understand this more.

thank you

 

[gneill]

Take each of the pieces of "equipment" in the diagram and try to list the types of energy they can have or store.