definition of negative feedback?

good luck for biology tomorrow! to sec4s

OH NO! I FORGOT MY EXAM IN HALL TMR. DIE.

doomsday tomorrow. D;

back from library.

three more days...D;

what's with the random chat with a random person=.=

took very long to clear my email due to spams from facebook=.=

i feel slack.

back from orchard lol