Create a timer with its "UserData" property set to 0. And a timer function (you have to save it to a file) to switch this value between 0 and 1. Hope it helps! :)
% Timer
tmr = timer('Period', 1, ...
'ExecutionMode', 'fixedRate', ...
'TimerFcn', @tmrFunction, ...
'UserData', 0);
start(tmr)
% Timer function
function tmrFunction(Source, Event)
switch Source.UserData
case 0; Source.UserData = 1;
case 1; Source.UserData = 0;
end
end
