t_endwhile

I was trying to get my posts to be visable on the home page without having to click the title and be sent to a new page with the post, I still havn’t figured out how to do that, but now Im having an even worse problem, I must have messed something up on the single.php, because now when i click the post it sends to to an error page with this message;
Parse error: syntax error, unexpected T_ENDWHILE in /home/joeandbox/joeandbox.com/wp-content/themes/grisaille/single.php on line 21

PLEASE HELP ME!!!!

https://www.joeandbox.com