Pam,
If you're talking about the picture at the bottom in the wt:
1. Pink-purple: the slots are at 3 o'clock for tuning fork #3 and 6 o'clock positioned for #2 tuning fork.
The tuning fork at foreground is #3 and above that is #2.
2. Green: slot at 9 o'clock is #1, 6 o'clock is #2 and 12 o'clock is #4.
The tuning forks in foreground is #4, top left green is #1 and top right is #2.
The button for both circle is just below the 6 o'clock slot.
The tuning bar is for you to know the sound of the tuning fork.