-- trace these signals
trace /tb/D(3)
trace /tb/D(2)
trace /tb/D(1)
trace /tb/D(0)
trace /tb/Q(3)
trace /tb/Q(2)
trace /tb/Q(1)
trace /tb/Q(0)
trace /tb/D
trace /tb/Q
trace /tb/carry
trace /tb/load
trace /tb/count
trace /tb/clock

-- trace internal (to the counter) signals
trace /TB/UUT/here
trace /TB/UUT/Q_int
trace /TB/UUT/Q_int(3)
trace /TB/UUT/Q_int(2)
trace /TB/UUT/Q_int(1)
trace /TB/UUT/Q_int(0)

-- run the simulation for 900 ns
run 900