diff --git a/beautiful-racket-demo/basic-demo-3/misc.rkt b/beautiful-racket-demo/basic-demo-3/misc.rkt
index 00e5b02..dbb2564 100644
--- a/beautiful-racket-demo/basic-demo-3/misc.rkt
+++ b/beautiful-racket-demo/basic-demo-3/misc.rkt
@@ -1,6 +1,6 @@
 #lang br
 (require "struct.rkt")
-(provide b-rem b-print b-let b-input b-require)
+(provide b-rem b-print b-let b-input b-statement b-require)
 
 (define (b-rem val) (void))
 
@@ -14,4 +14,6 @@
                      [num (string->number (string-trim str))])
                 (or num str))))
 
+(define-macro (b-statement STMT) #'STMT)
+
 (define-macro (b-require ID) #'(void))
\ No newline at end of file
diff --git a/beautiful-racket-demo/basic-demo-3/runtime.rkt b/beautiful-racket-demo/basic-demo-3/runtime.rkt
index 229a3d5..45360ad 100644
--- a/beautiful-racket-demo/basic-demo-3/runtime.rkt
+++ b/beautiful-racket-demo/basic-demo-3/runtime.rkt
@@ -1,12 +1,16 @@
 #lang br
-(require (prefix-in basic: (submod "main.rkt" reader)))
+(require "parser.rkt" "tokenizer.rkt")
 (provide current-basic-port configure-repl!)
 
 (define current-basic-port (make-parameter #f))
 
 (define (configure-repl!)
-  ;; wrap REPL interactions with pollen expression support
-  (define racket-read (current-read-interaction))
-  (define (basic-read src in)
-    (basic:read-syntax src in))
-  (current-read-interaction basic-read))
\ No newline at end of file
+  (define statement-parser (make-rule-parser b-statement))
+  (define (read-one-line path port)
+    (define one-line (read-line port))
+    (if (eof-object? one-line)
+        eof
+        (statement-parser (make-tokenizer (open-input-string one-line)))))
+  (current-read-interaction read-one-line))
+
+
diff --git a/beautiful-racket-demo/basic-demo-3/sample-shell.rkt b/beautiful-racket-demo/basic-demo-3/sample-shell.rkt
index 33d077f..7742dd5 100644
--- a/beautiful-racket-demo/basic-demo-3/sample-shell.rkt
+++ b/beautiful-racket-demo/basic-demo-3/sample-shell.rkt
@@ -1,2 +1,4 @@
 #lang basic-demo-3
-10 print "got shell arg" : print arg0 : print arg1
\ No newline at end of file
+10 print "got shell arg" : print arg0 : print arg1
+20 a = 5
+30 def f(x) = x ^ x
\ No newline at end of file