Perl 6 power over Fibonacci sequence.

LazyFib.pl6

#!/usr/bin/perl6

use v6;

my @fib := ^2, *+* ... *; # lazy list with fibonacci sequence under memoization
sleep +(.say) for @fib;

# foreach @fib get a $value, so print this $value, then cast the Bool result of say (True)
# into a Integer, now you can pass this Integer (1) for a sleep (delay $x seconds) function...

#-----------------------------------#
# ^2   |===> Non-structured.Array   #
# *+*  |===> Declarative.Functional #
# :=   |===> Declarative.Logic      #
# .say |===> Structured.OOP         #
# $_   |===> Point-free | Tacit     #
#-----------------------------------#

# end of script