that not really something you'd link to... if you're new look for a flash tutorial. a bool means there can only be true or false as the answer, in other words, 0 or 1. put something like
if(whatever you wanted to be seen first has been pushed);
goto the next frame;
else
display something telling them to watch the something else first.;
obviously that's not real code, but that's the general gist of what the other guy was trying to tell you.