% WA6:  Modeling BOLD response

% Using spm_hrf, or your favorite model for the BOLD response, simulate the
% BOLD response to the following experiments. In each case, assume that the
% repetition time (TR) for your imaging study is 1.5s.
%
% 1) Rest for 5s, stimulus for 1s, rest for 30s.
%
% 2) Stimulus for 1s at t = 6, 12, 15, and 24s.  Total experiment is 40s.
%
% 3) Block alternation: rest, stim, rest, stim, rest, stim, rest, stim,
% rest.  A) 12s per block; B) 9s per block; C) 24s per block.