diff --git a/a8/lisp.cc b/a8/lisp.cc
index 850c659..92e3062 100644
--- a/a8/lisp.cc
+++ b/a8/lisp.cc
@@ -3,6 +3,7 @@
 #include <ctype.h>
 
 #include <a8/lisp.h>
+#include <a8/mutable_xobject.h>
 
 namespace a8
 {
@@ -34,6 +35,49 @@ namespace a8
             value = cproc;
         }
 
+        a8::XObject Value::ToXObject()
+        {
+            switch (type) {
+            case ValueType::kAtom:
+                {
+                    Atom&& atom = std::any_cast<Atom>(value);
+                    a8::XValue v(atom.val);
+                    return a8::XObject(v);
+                }
+                break;
+            case ValueType::kList:
+                {
+                    auto arr = a8::MutableXObject::CreateArray();
+                    List list = std::any_cast<List>(value);
+                    for (auto ele : *list) {
+                        a8::XObject xobj = ele->ToXObject();
+                        arr->Push(xobj);
+                    }
+                    return *arr;
+                }
+                break;
+            case ValueType::kSymbol:
+                {
+                    Symbol&& symbol = std::any_cast<Symbol>(value);
+                    auto obj = a8::MutableXObject::CreateObject();
+                    obj->SetVal("name", symbol.name);
+                    return *obj;
+                }
+                break;
+            case ValueType::kCProc:
+                {
+                    auto obj = a8::MutableXObject::CreateObject();
+                    return *obj;
+                }
+                break;
+            default:
+                {
+                    abort();
+                }
+                break;
+            }
+        }
+
         std::shared_ptr<Value> Scope::Find(const std::string& name)
         {
             auto itr = vars_.find(name);
@@ -170,7 +214,10 @@ namespace a8
                 token = ")";
                 return 1;
             }
-            while (pos < script.size() && !isspace(script[pos])) {
+            while (pos < script.size() &&
+                   !isspace(script[pos]) &&
+                   script[pos] != ')' &&
+                   script[pos] != '(') {
                 token += script[pos];
                 ++pos;
             }
diff --git a/a8/lisp.h b/a8/lisp.h
index 6704386..c7bd48b 100644
--- a/a8/lisp.h
+++ b/a8/lisp.h
@@ -43,6 +43,7 @@ namespace a8
             Value(Symbol symbol);
             Value(CProc cproc);
             bool IsType(ValueType t) { return t == type; };
+            a8::XObject ToXObject();
         };
 
         class Scope
diff --git a/a8/mutable_xobject.cc b/a8/mutable_xobject.cc
index 7a82ba9..97ee933 100644
--- a/a8/mutable_xobject.cc
+++ b/a8/mutable_xobject.cc
@@ -31,7 +31,7 @@ namespace a8
         return *this;
     }
 
-    a8::MutableXObject& MutableXObject::Push(a8::MutableXObject& val)
+    a8::MutableXObject& MutableXObject::Push(a8::XObject& val)
     {
         if (type_ != XOT_ARRAY) {
             abort();
diff --git a/a8/mutable_xobject.h b/a8/mutable_xobject.h
index 8e6e5d3..5339b45 100644
--- a/a8/mutable_xobject.h
+++ b/a8/mutable_xobject.h
@@ -14,7 +14,7 @@ namespace a8
         static std::shared_ptr<a8::MutableXObject> CreateArray();
 
         a8::MutableXObject& Push(a8::XValue val);
-        a8::MutableXObject& Push(a8::MutableXObject& val);
+        a8::MutableXObject& Push(a8::XObject& val);
         a8::MutableXObject& SetVal(const std::string& key, a8::XValue val);
         a8::MutableXObject& SetVal(const std::string& key, a8::XObject& val);
         a8::MutableXObject& SetVal(const std::string& key, a8::MutableXObject& val);