Share My Creation Clock with Wake up time and CO Detector

This system have four seven segment for show current time and wake up time and CO value.
there is four key .
key 1 for select mode show time or wake up time or co value
key 2 for set minute
key 3 for set hour
key 4 for enable or disable wake up mode

led 1 turn on in clock mode
led 2 turn on in wake up time setting mode
led 3 turn on in show CO detector mode
led 4 turn on in wake up enable