Creating a timer without pause

*How do I create a timer in one function and have a callback in another function*

ie:

function createtimer

t = timer... %Finish Timer statement

start(t)

end

function TimerCallback

% Do whatever

end

OR

*How do I create a timer, that will wait x amount of seconds before executing the next line of code (Similar to pause but not pause) *

ie:

function Starttimer

disp('hello')

t = timer ..

start(t)

disp('world')

end