Need help with making a riddle

%Asking the user 3 riddles.

riddle1prompt='The person who built it sold it. The person who bought it never used it. The person who used it never saw it. What is it? ';

riddle1=input(riddle1prompt,'s');

riddle1='Coffin'

fprintf('\n')

if (riddle1==Coffin)

%Only asks next riddle if the user got the first one right.

riddle2prompt='Nice job, sadly Jack and Ethan did not fair so well. Oh well. Your next riddle is; I dont have eyes, but once I did see. Once I had thoughts, but now Im white and empty. What am I? ';

riddle2=input(riddle2prompt,'s');

riddle2='Skull'

elseif(riddle1~=Coffin)

%The game is over and the user has to start over.

fprintf('Oh no, what did I say about not messing up. ITS GAME OVER FOR YOU,%s.',name)

firstroom=false;

end