Thanks a lot it works great.
i was worried about how i was going to keep them together when they are moving but i figured it out.

i have the original block call this when its created

you = ent_create(cracks......

which places the cracks and keeps the pointer you
then every frame i set

my.x = you.x;
my.pan = you.pan;
my.tilt = you.tilt;
......

Then i have the cracks do the moving part and the original block follows.

maybe you don't care about the details.... But Thanks again!!!