Sorry for the truncated subject line ...
Basically I want to set a numeric variable on all instances of a sprite when all instances of the sprite have a certain variable set ...
For example, two objects are moving back to their original positions on the screen. When they arrive at their original positions they set their instance variable "phase" to 4
When all of these sprites have 4 as their "phase" variable I want to set all of the sprites phase variables to zero.