I like to use a little timing vi to see if the time has elapsed for a certain event. If the output is true, you can make a case structure so that it sends a command to your stages and restarts the timer.
The timer uses an uninitialized shift register, so make sure to call it once using the "start" mode before checking how much time has elapsed. You can call it many times from anywhere in your program, and wire the error lines to make sure it executes in the order you want.
