diff --git a/lib/farmbot/celery_script/ast/node/scope_decleration.ex b/lib/farmbot/celery_script/ast/node/scope_decleration.ex
new file mode 100644
index 00000000..e8f28950
--- /dev/null
+++ b/lib/farmbot/celery_script/ast/node/scope_decleration.ex
@@ -0,0 +1,10 @@
+defmodule Farmbot.CeleryScript.AST.Node.ScopeDeclaration do
+  @moduledoc false
+  use Farmbot.CeleryScript.AST.Node
+  allow_args []
+
+  def execute(_, _, env) do
+    env = mutate_env(env)
+    {:ok, env}
+  end
+end
diff --git a/test/farmbot/celery_script/ast/heap_test.exs b/test/farmbot/celery_script/ast/heap_test.exs
new file mode 100644
index 00000000..5d4e394b
--- /dev/null
+++ b/test/farmbot/celery_script/ast/heap_test.exs
@@ -0,0 +1,85 @@
+defmodule Farmbot.CeleryScript.AST.HeapTest do
+  use ExUnit.Case
+  alias Farmbot.CeleryScript.AST
+  alias AST.Heap
+  alias AST.Heap.Address
+
+  describe "Address" do
+    test "inspect gives nice stuff" do
+      assert inspect(Address.new(100)) == "HeapAddress(100)"
+    end
+
+    test "increments an address" do
+      base = Address.new(123)
+      assert Address.inc(base) == Address.new(124)
+    end
+
+    test "decrements an address" do
+      base = Address.new(123)
+      assert Address.dec(base) == Address.new(122)
+    end
+  end
+
+  test "initializes a new heap" do
+    heap = Heap.new()
+    assert is_null?(heap.here)
+  end
+
+
+
+  test "alots one kind on the heap" do
+    heap = Heap.new()
+    aloted = Heap.alot(heap, "abc")
+    assert aloted.here == Address.new(1)
+    assert match?(%{:"🔗kind" => "abc"}, aloted.entries[Address.new(1)])
+  end
+
+  test "Heap access with address" do
+    heap =
+      Heap.new()
+      |> Heap.alot("abc")
+      |> Heap.alot("def")
+      |> Heap.alot("ghi")
+    assert is_null?(heap.entries[Address.new(0)])
+    assert match?(%{:"🔗kind" => "abc"}, heap.entries[Address.new(1)])
+    assert match?(%{:"🔗kind" => "def"}, heap.entries[Address.new(2)])
+    assert match?(%{:"🔗kind" => "ghi"}, heap.entries[Address.new(3)])
+  end
+
+  test "puts a key value pair on an existing aloted slot" do
+    heap =
+      Heap.new()
+      |> Heap.alot("abc")
+      |> Heap.put("key", "value")
+    assert match?(%{:"🔗kind" => "abc", key: "value"}, heap.entries[Address.new(1)])
+  end
+
+  test "Puts key/value pairs at arbitrary addresses" do
+    heap =
+      Heap.new()
+      |> Heap.alot("abc")
+      |> Heap.alot("def")
+      |> Heap.alot("ghi")
+    mutated = Heap.put(heap, Address.new(2), "abc_key", "value")
+    assert match?(%{:"🔗kind" => "def", abc_key: "value"}, mutated.entries[Address.new(2)])
+  end
+
+  test "Can't update on bad a address" do
+    heap =
+      Heap.new()
+      |> Heap.alot("abc")
+      |> Heap.alot("def")
+      |> Heap.alot("ghi")
+    assert_raise RuntimeError, fn() ->
+      Heap.put(heap, Address.new(200), "abc_key", "value")
+    end
+  end
+
+  defp is_null?(%Address{value: 0}), do: true
+  defp is_null?(%Address{value: _}), do: false
+  defp is_null?(%{"🔗body": %Address{value: 0},
+    "🔗kind": Farmbot.CeleryScript.AST.Node.Nothing,
+    "🔗next": %Address{value: 0},
+    "🔗parent": %Address{value: 0} }), do: true
+  defp is_null?(_), do: false
+end