diff --git a/lib/csys/csys.ex b/lib/csys/csys.ex
index d6ed946..7d7e4bc 100644
--- a/lib/csys/csys.ex
+++ b/lib/csys/csys.ex
@@ -2,10 +2,13 @@ defmodule Scopes.CSys do
   require Logger
 
   alias Scopes.Core.Actor
+  alias Scopes.CSys.Environ
+  alias Scopes.Shape
 
   def neuron(scope) do
     Logger.info([scope: inspect(scope)])
     Actor.create(fn msg -> process(msg, scope) end)
+    # Environ.register(env, ac, ...)
   end
 
   def update_neuron(scope) do
@@ -22,6 +25,18 @@ defmodule Scopes.CSys do
     proc(scope).(msg, scope)
   end
 
+  def setup(progname, prog) do
+    env = Environ.create(self())
+    Environ.put_prog(env, progname, prog)
+    proc = Environ.get_stage(env, progname, :initial)
+    neuron({[], proc, [], env})
+  end
+
+  def send_value(rcvr, val) do
+    msg = Shape.create([:csys, :data], data: %{value: val})
+    Actor.send(rcvr, msg)
+  end
+
   def state(scope), do: elem(scope, 0)
   def proc(scope), do: elem(scope, 1)
   def syns(scope), do: elem(scope, 2)
diff --git a/lib/csys/program.ex b/lib/csys/program.ex
index 8d2aadf..3734c3a 100644
--- a/lib/csys/program.ex
+++ b/lib/csys/program.ex
@@ -20,8 +20,8 @@ defmodule Scopes.CSys.Program do
 
   def basic_active(msg = {head, _info}, scope) do
     case head do
-      [:csys, :create, :parent | _rest] -> create_parent(scope)
-      [:csys, :create, :child | _rest] -> create_child(scope)
+      [:csys, :create, :pred | _rest] -> create_pred(scope)
+      [:csys, :create, :succ | _rest] -> create_succ(scope)
       _ -> forward(msg, scope) || notify(msg, scope)
     end
   end
@@ -46,14 +46,14 @@ defmodule Scopes.CSys.Program do
 # todo: provide parameters for initial state, proc / stage, op,
 #       depending on state and stage (proc) of self, as well as message, env, ...
 
-  def create_parent(scope = {_state, proc, _syns, env}) do
+  def create_pred(scope = {_state, proc, _syns, env}) do
     syn = synapse(self(), &Function.identity/1, 0)
     #neuron({[], Environ.get_stage(env, :basic, :initial), [syn], env})
     new = neuron({[], proc, [syn], env})
     notify({:created, new}, scope)
   end
 
-  def create_child (scope = {state, proc, syns, env}) do
+  def create_succ (scope = {state, proc, syns, env}) do
     new = neuron({[], proc, [], env})
     syn = synapse(new, &Function.identity/1, 0)
     update_neuron({state, proc, [syn | syns], env})
diff --git a/test/csys_test.exs b/test/csys_test.exs
index 02a5f90..82a620a 100644
--- a/test/csys_test.exs
+++ b/test/csys_test.exs
@@ -4,32 +4,28 @@ defmodule Scopes.CSysTest do
 
   alias Scopes.Core.Actor
   alias Scopes.CSys
-  alias Scopes.CSys.Environ
   alias Scopes.CSys.Program
   alias Scopes.Shape
 
-  def send_value(rcvr, val) do
-    msg = Shape.create([:csys, :data], data: %{value: val})
-    Actor.send(rcvr, msg)
-  end
-
-  def receive_head(head) do
+  def receive_with(head) do
     assert_receive {^head, info}
     {head, info}
   end
 
+  def receive_data() do
+    Shape.data(receive_with([:csys, :data]))
+  end
+
   describe "basic:" do
     test "minimal-neural-net" do
-      env = Environ.create(self())
-      Environ.put_prog(env, :basic, Program.basic_prog())
-      proc = Environ.get_stage(env, :basic, :initial)
-      zero = CSys.neuron({[], proc, [], env})
+      zero = CSys.setup(:basic, Program.basic_prog())
       #Actor.send(zero, "Hello Zero!")
-      send_value(zero, "Hello Zero!")
-      assert "Hello Zero!" = Shape.data(receive_head([:csys, :data])).value
-      Actor.send(zero, {[:csys, :create, :parent], nil})
+      CSys.send_value(zero, "Hello Zero!")
+      assert "Hello Zero!" = receive_data().value
+      Actor.send(zero, {[:csys, :create, :pred], nil})
+      #Actor.send(zero, {[:csys, :create, :pred], data: %{op: &neg_only})
       assert_receive {:created, new1}
-      Actor.send(new1, {[:csys, :create, :child], nil})
+      Actor.send(new1, {[:csys, :create, :succ], nil})
       assert_receive {:created, _new2}
       Actor.send(new1, "Hello New1!")
       assert_receive "Hello New1!"