Counter Design using MUX, D flipflops and Adder only

[AncientMariner]

How do I design a counter that counts the number of times the number “5” appears in an 4-bit input stream.
These are the inputs:
NumberIn : 4-bits wide (input)
Start: Reset counter and overflow flag to zero while start is high (input)
Count: 8-bit unsigned count (of the number of “5”s that have occurred since start went
low (output)
Overflow: Goes high if count overflows (count is unsigned, so you only need to monitor
the adder carry out) and stays high until start is re-asserted.

Any inputs or help is appreciated!!

 

[barry]

This sure sounds like a homework problem that you want someone else to do for you...

Show some effort, dude.