diff --git a/beautiful-racket-demo/basic-demo-3/lexer.rkt b/beautiful-racket-demo/basic-demo-3/lexer.rkt
index 37d6d12..b3365f5 100644
--- a/beautiful-racket-demo/basic-demo-3/lexer.rkt
+++ b/beautiful-racket-demo/basic-demo-3/lexer.rkt
@@ -5,19 +5,18 @@
 
 (define-lex-abbrev reserved-terms (:or "print" "goto" "end" "+" ":" ";" "let" "=" "input" "-" "*" "/" "^" "mod" "(" ")" "def" "if" "then" "else" "<" ">" "<>" "and" "or" "not" "gosub" "return" "for" "to" "step" "next" "def" "," "import" "export"))
 
-(define-lex-abbrev id-kapu
+(define-lex-abbrev racket-id-kapu
   (:or whitespace (char-set "()[]{}\",'`;#|\\")))
 
-(define-lex-abbrev racket-id
-  (:seq "[" (:~ (:or "-" id-kapu)) (:* (:~ id-kapu)) "]"))
-
 (define basic-lexer
   (lexer-srcloc
    [(eof) (return-without-srcloc eof)]
    ["\n" (token 'NEWLINE lexeme)]
    [whitespace (token lexeme #:skip? #t)]
    [(from/stop-before "rem" "\n") (token 'REM lexeme)]
-   [racket-id (token 'RACKET-ID (string->symbol (trim-ends "[" lexeme "]")))] 
+   [(:seq "[" (:+ (:~ racket-id-kapu)) "]")
+    (token 'RACKET-ID
+           (string->symbol (trim-ends "[" lexeme "]")))] 
    [reserved-terms (token lexeme lexeme)]
    [(:seq alphabetic (:* (:or alphabetic numeric "$")))
     (token 'ID (string->symbol lexeme))]
diff --git a/beautiful-racket-demo/basic-demo-3/sample-export.rkt b/beautiful-racket-demo/basic-demo-3/sample-exporter.rkt
similarity index 100%
rename from beautiful-racket-demo/basic-demo-3/sample-export.rkt
rename to beautiful-racket-demo/basic-demo-3/sample-exporter.rkt
diff --git a/beautiful-racket-demo/basic-demo-3/sample-import.rkt b/beautiful-racket-demo/basic-demo-3/sample-import.rkt
index 9799586..9e86a92 100644
--- a/beautiful-racket-demo/basic-demo-3/sample-import.rkt
+++ b/beautiful-racket-demo/basic-demo-3/sample-import.rkt
@@ -1,7 +1,7 @@
 #lang basic-demo-3
-10 import math/number-theory
-20 print nth-prime(15)
-30 print prime?(24)
-40 import racket/base
-50 print max(f(1), f(2), f(5), f(4))
+10 import [math/number-theory]
+20 print [nth-prime](15)
+30 print [prime?](24)
+40 import [racket/base]
+50 print [max](f(1), f(2), f(5), f(4))
 60 def f(x) = x + x
\ No newline at end of file
diff --git a/beautiful-racket-demo/basic-demo-3/sample-importer.rkt b/beautiful-racket-demo/basic-demo-3/sample-importer.rkt
new file mode 100644
index 0000000..a1654ec
--- /dev/null
+++ b/beautiful-racket-demo/basic-demo-3/sample-importer.rkt
@@ -0,0 +1,5 @@
+#lang br
+(require basic-demo-3/sample-exporter)
+div
+x
+(div x 10)
\ No newline at end of file
diff --git a/beautiful-racket-demo/basic-demo-3/sample-require.rkt b/beautiful-racket-demo/basic-demo-3/sample-require.rkt
deleted file mode 100644
index 639ca04..0000000
--- a/beautiful-racket-demo/basic-demo-3/sample-require.rkt
+++ /dev/null
@@ -1,5 +0,0 @@
-#lang br
-(require "sample-export.rkt")
-div
-x
-(div x 10)
\ No newline at end of file
diff --git a/beautiful-racket-demo/basic-demo-3/setup.rkt b/beautiful-racket-demo/basic-demo-3/setup.rkt
index fd0b625..8907934 100644
--- a/beautiful-racket-demo/basic-demo-3/setup.rkt
+++ b/beautiful-racket-demo/basic-demo-3/setup.rkt
@@ -5,9 +5,9 @@
 (define basic-output-port
   (make-parameter (open-output-nowhere)))
 
-(define (do-setup!)
+(define (do-setup! [where #f])
   (basic-output-port (current-output-port))
-  (current-read-interaction read-one-line))
+  #;(current-read-interaction read-one-line))
 
 (define repl-parser (make-rule-parser b-repl))