How to index time interval more efficiently?

Hi Matlab Coder, The objective is to index each of the matrix, as follow

where_owl = [8  9  32  33  56  57]
owl_hide =  [9 20  33  44  57  68]
owl_awake = [0  8  24  32  48  56]

How to make following code more compact and efficient, especially the for-loop. Thanks in advance

s.days                              = 3;
s.sph                               = 3600;
s.hpd                               = 24;
s.mph                               = 60;

owl_awake = zeros(1,10);
owl_hide = zeros(1,10);
where_owl = zeros(1,10);
total_hour = 2 * s.days  *s.hpd;
last_iteration = total_hour/s.hpd;
s.sleeptime_time =zeros (1,last_iteration);
a=0;
%%%%%   Case 1: Timing| All unit in seconds
for i = 1:2:last_iteration
  a=a+1;
  % owl_awake 0000 to 0800 every day
  owl_awake (:,i) = ((a-1)*s.hpd);
  owl_awake (:,(i+1))= (8+ ((a-1)*s.hpd));
  % owl_hide between 0900 and 2000
  owl_hide (:,i)          = (9 + ((a-1)*s.hpd));
  owl_hide (:,(i+1))      = (20 + ((a-1)*s.hpd));
  % where is the owl
  where_owl (:,i)       = (8 + ((a-1)*s.hpd)) ;
  where_owl (:,(i+1))   = (9 + ((a-1)*s.hpd));
end