# Adder, two inputs, one output
adder:Function {
  func = ```
    n2_out = n0_in + n1_in
  ```;
}
n0_in:InPort
n1_in:InPort
n2_out:OutPort
:hasInPort (adder -> n0_in)
:hasInPort (adder -> n1_in)
:hasOutPort (adder -> n2_out)

# Delay block 0
d0:Delay
d0_in:InPort
d0_out:OutPort
:hasInPort (d0 -> d0_in)
:hasOutPort (d0 -> d0_out)


# Delay block 1
d1:Delay
d1_in:InPort
d1_out:OutPort
:hasInPort (d1 -> d1_in)
:hasOutPort (d1 -> d1_out)


# Connections
conn0:link (n2_out -> d1_in) # n2 becomes n1 in next step
conn1:link (d1_out -> d0_in) # n1 becomes n0 in next step
conn2:link (d1_out -> n1_in) # n1 input to adder
conn3:link (d0_out -> n0_in) # n0 input to adder