Multiple Stages in one Program

[Amit]

I want to add multiple stages in my program.

For Example:
Stage 1:
Avatar Male is at postion (x1,y1,z1)
Avatar Female is at position (x2,y2,z2)

Stage 2:
Avatar Male is at position (x3,y3,z3)
Avatar Female is at position (x4,y4,z4)

Using keyboard keys, I should switch between these two stages, I don't want to write scripts for the positions of the avatar.

How should I go about this?

-Amit