Haha...Finally finished DE lab test...I think I am the only one who use computer to draw the circuit diagram...

This is the first part of the lab test. Basically, it is a 16-MOD counter...It is also a frequency divider..

This is the second part... It's a 8 to 1 mulitiplexer...Its function is to choose one of the inputs as its output...

This is the full circuit diagram that I design...The third part is a 1 to 8 demultiplexer...haha..
Hopefully I can pass my lab test...Haha...God bless me!!!