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diff --git a/alee.cpp b/alee.cpp
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+/**
+ * Alee Forth: A portable and concise Forth implementation in modern C++.
+ * Copyright (C) 2023  Clyne Sullivan <clyne@bitgloo.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "memdict.hpp"
+#include "parser.hpp"
+
+#include <iostream>
+
+// : variable create 0 , ;
+// : create here constant ;
+// : constant
+
+int main()
+{
+    MemDict dict;
+    State state (dict);
+    Parser parser;
+
+    for (;;) {
+	std::string line;
+	std::cout << state.size() << ' ' << state.compiling << "> ";
+	std::getline(std::cin, line);
+
+	ParseStatus r;
+	std::string_view lv (line);
+	do {
+	    r = parser.parse(state, lv);
+	} while (r == ParseStatus::Continue);
+
+	if (r != ParseStatus::Finished)
+	    std::cout << "r " << to_string(r) << std::endl;
+    }
+
+    return 0;
+}
+
+int user_sys(State& state)
+{
+    const auto value = state.pop();
+    std::cout << value << std::endl;
+    return 0;
+}
+