Timer Question

[durf]

Hello,

I have a program that I want to run for 10 minutes. In those 10 minutes I want it to check for the time. For the first 3 minutes I want it to run one function. After the 3 minutes expires I want it to start another function for 4 minutes. When that expires I want it to run another function for the remaining 3 minutes.

Do I use a starttimer and have the starttimer equal something and put the 3 functions in a loop so it keeps checking the time?

Im looking for a good way to write this.

Thanks

Example:

viz.go()
.
.
.
def function1():

"code"

//end of function 1

def function2():

"code"

//end of function 2

def function3():

"code"

//end of function 3