diff --git a/code.txt b/code.txt
index 2aa4dee..a360497 100755
--- a/code.txt
+++ b/code.txt
@@ -13,3 +13,4 @@
 Set Prefix To BeginText Hi there, EndText EndSet
 Set Greeting To Prefix Append Name EndSet
 System Print Greeting Done
+System Exit Done
diff --git a/interp.py b/interp.py
index d3ad996..b1571e1 100644
--- a/interp.py
+++ b/interp.py
@@ -2,6 +2,7 @@
 # Copyright 2021 Jookia <contact@jookia.org>
 
 import ast_types
+import sys
 
 class Text:
     def __init__(self, value):
@@ -35,6 +36,9 @@
     def verb_Read(self, args):
         return Text(input())
 
+    def verb_Exit(self, args):
+        sys.exit(0)
+
 class InterpreterError(BaseException):
     def __init__(self, error):
         self.error = error
@@ -88,10 +92,9 @@
             raise InterpreterError("Unknown command type %s" % (ast.__class__.__name__))
 
     def run(self, ast):
-        ret = None
-        for command in ast:
-            ret = self.run_command(command)
-        return ret
+        while True:
+            for command in ast:
+                ret = self.run_command(command)
 
 def run_ast(ast):
     env = {