diff --git a/beautiful-racket-demo/basic-demo-3/expander.rkt b/beautiful-racket-demo/basic-demo-3/expander.rkt
index 3233564..59f02f0 100644
--- a/beautiful-racket-demo/basic-demo-3/expander.rkt
+++ b/beautiful-racket-demo/basic-demo-3/expander.rkt
@@ -1,5 +1,5 @@
 #lang br/quicklang
-(require "struct.rkt" "run.rkt" "elements.rkt" "runtime.rkt")
+(require "struct.rkt" "run.rkt" "elements.rkt" "setup.rkt")
 (provide (rename-out [b-module-begin #%module-begin])
          (all-from-out "elements.rkt"))
 
@@ -17,16 +17,17 @@
           (list (suffix-id #'arg idx #:context caller-stx) val))])
     #'(#%module-begin
        (module configure-runtime br
-         (require basic-demo-3/runtime)
-         (configure-this!))
+         (require basic-demo-3/setup)
+         (do-setup!))
        (require IMPORT-NAME) ...
-       (define VAR-ID 0) ...
        (provide EXPORT-NAME ...)
+       (define VAR-ID 0) ...
        (set! SHELL-ID SHELL-VAL) ...
        LINE ...
        (define line-table
          (apply hasheqv (append (list NUM LINE-FUNC) ...)))
-       (parameterize ([current-output-port (basic-output-port)])
+       (parameterize
+           ([current-output-port (basic-output-port)])
          (void (run line-table))))))
 
 (begin-for-syntax
diff --git a/beautiful-racket-demo/basic-demo-3/misc.rkt b/beautiful-racket-demo/basic-demo-3/misc.rkt
index da687ce..3712bf4 100644
--- a/beautiful-racket-demo/basic-demo-3/misc.rkt
+++ b/beautiful-racket-demo/basic-demo-3/misc.rkt
@@ -14,9 +14,9 @@
                      [num (string->number (string-trim str))])
                 (or num str))))
 
-(define-macro (b-import IMPORT-NAME) #'(void))
+(define-macro (b-import NAME) #'(void))
 
-(define-macro (b-export EXPORT-NAME) #'(void))
+(define-macro (b-export NAME) #'(void))
 
 (define-macro (b-repl . ARGS)
   (with-pattern ([STMTS (pattern-case-filter #'ARGS
diff --git a/beautiful-racket-demo/basic-demo-3/runtime.rkt b/beautiful-racket-demo/basic-demo-3/runtime.rkt
deleted file mode 100644
index 4c29eca..0000000
--- a/beautiful-racket-demo/basic-demo-3/runtime.rkt
+++ /dev/null
@@ -1,21 +0,0 @@
-#lang br
-(require "parser.rkt" "tokenizer.rkt")
-(provide basic-output-port configure-this!)
-
-(define basic-output-port
-  (make-parameter (open-output-nowhere)))
-
-(define repl-parser (make-rule-parser b-repl))
-
-(define (configure-this!)
-  (basic-output-port (current-output-port))
-  
-  (define (read-one-line path port)
-    (define one-line (read-line port))
-    (if (eof-object? one-line)
-        eof
-        (repl-parser
-         (make-tokenizer (open-input-string one-line)))))
-  (current-read-interaction read-one-line))
-
-
diff --git a/beautiful-racket-demo/basic-demo-3/setup.rkt b/beautiful-racket-demo/basic-demo-3/setup.rkt
new file mode 100644
index 0000000..fd0b625
--- /dev/null
+++ b/beautiful-racket-demo/basic-demo-3/setup.rkt
@@ -0,0 +1,21 @@
+#lang br
+(require "parser.rkt" "tokenizer.rkt")
+(provide basic-output-port do-setup!)
+
+(define basic-output-port
+  (make-parameter (open-output-nowhere)))
+
+(define (do-setup!)
+  (basic-output-port (current-output-port))
+  (current-read-interaction read-one-line))
+
+(define repl-parser (make-rule-parser b-repl))
+
+(define (read-one-line path port)
+  (define one-line (read-line port))
+  (if (eof-object? one-line)
+      eof
+      (repl-parser
+       (make-tokenizer (open-input-string one-line)))))
+
+