create lil' demo program.

src/main.mjs

@@ -1,4 +1,20 @@
 import { parse } from "./parse.mjs";
+import { compile } from "./compile.mjs";
+import { execute } from "./execute.mjs";
 
 
 
+const lines = parse("main = a b → a").lines;
+const program = compile(lines);
+
+function prettify (code) {
+	if (Array.isArray(code)) {
+		return prettify(code[0]).concat(prettify(code[1]));
+	}
+	if (code === 0) {
+		return "λ";
+	}
+	return code.toString();
+}
+
+console.log(execute(program.env.get("main"))(1)(2));