Google arduino count-down timer
google panel mount electrical key switch
google arduino lcd display (you didn't specify type)
google arduino piezo alarm
google panel mount momentary push button
please keep replies a simple as possible total newbie here
Is that simple enough for you ?
We don't mind helping you but we won't do all of the work for you. Please post what you've already done including any ideas you've had and we might be able to make some suggestions. If you've got completely no idea then maybe it's your lecturer’s fault and it isn't right that you make him/her look good by cheating and copying from the Internet.