You need to create a state machine for that. It is done by doing something like:
byte state = 0;
//Other code
void loop()
{
switch(state)
{
case(0):
fadeAllInAndOut();
state++; //Pseudo-code - this should be done when state has finished
break;
case(1):
fade7InAndOut();
state++;
break;
case(2):
fade6And8InAndOut();
state++;
break;
//More states here
default: //If no state is triggered, reset state to 0
state = 0;
break; //Not needed, just for good measures
}
}