title: How to execute subroutine in parallel?
body: <p>I want to know how to execute two subroutines in parallel.</p>
  
  <p>In Perl Tk, I am using  one buttons widget and text widget.</p>
  
  <p>Button : is to execute the parser function 
  Text   : is to display the print statement of the parser</p>
  
  <p>Thing is that after executing the parser function only the text widget is getting executed 
  [because Perl support sequential execution]</p>
  
  <p>But I want both of them to be executed in parallel.</p>