diff --git a/jsvmp/demo.js b/jsvmp/demo.js
new file mode 100644
index 0000000..f39dbde
--- /dev/null
+++ b/jsvmp/demo.js
@@ -0,0 +1,23 @@
+!function (_stack) {
+    var register;
+    var variable = {};
+    for (let i = 0; i < _stack.length; i++) {
+        instruct = _stack[i][0];
+        left = _stack[i][1];
+        right = _stack[i][2];
+        if (instruct === 110) {
+            variable[right] = ''
+        }
+        if (instruct === 66) {
+            if (right === '?') {
+                variable[left] = register
+            } else {
+                variable[left] = right
+            }
+        }
+        if (instruct === 88) {
+            register = variable[left] + variable[right]
+        }
+    }
+    ;console.log(variable)
+}([[110, 'var', 'a'], [66, 'a', 1000], [110, 'var', 'b'], [66, 'b', 1000], [110, 'var', 'c'], [66, 'c', 1000], [110, 'var', 'd'], [88, 'a', 'b'], [66, 'd', '?'], [110, 'var', 'e'], [88, 'd', 'c'], [66, 'e', '?']])
\ No newline at end of file