diff --git a/expander.rkt b/expander.rkt
index a1ae13b..02de7b4 100644
--- a/expander.rkt
+++ b/expander.rkt
@@ -1,40 +1,108 @@
 #lang br/quicklang
-(namespace-require 'racket/base) ; must be added for the currect namespace
+ (require racket/dict)
+(require racket/match)
+(namespace-require/copy	  'racket/base) ; must be added for the currect namespace
+
+(define-macro (init-defs)
+  #'(begin
+      '()))
+
+(define paperwidth 2480)
+(define paperheight 3508)
+(define frame-list '())
+(define main-style
+  (make-hash '(["font-family" . "FreeSerif"]
+               ["font-family-CJK" . "Noto Sans CJK TC"]
+               ["font-size" . 12]
+               ["font-weight" . "regular"]
+               ["font-style" . "normal"])))
+
+(define main-frame 
+  (make-hash '(["type" . "frame"]
+               ["id" . "main"]
+               ["content" . #f]
+               ["style" . main-style]
+               ["x". 1800]
+               ["y". 3200]
+               ["width". 1800]
+               ["height" . 3200]
+               ["skip-to-footnote". 80])
+      ))
+(set! frame-list (cons main-frame frame-list))
+(define (hd2 cont) 
+  (make-hash `(["type" . "hbox"]
+               ["id" . ""]
+               ["content" . ,cont]
+               ["style" . ["style" . ,(make-hash '(["font-family" . "FreeSerif"]
+                            ["font-family-CJK" . "Noto Sans CJK TC"]
+                            ["font-size" . 15]
+                            ["font-weight" . "regular"]
+                            ["font-style" . "normal"]))]]
+               ["x". #f]
+               ["y". #f]
+               ["width". #f]
+               ["height" . #f]
+)
+      ))
+
+(define (maintext cont)
+  (match cont
+    [`(mixed-series ,(list `newline a ...)) (mixed-series a)]
+    [_ cont]))
 
 
-(define paperwidth #f)
-(define paperheight #f)
-(define (set x y) (set! x y))
-(define (add x y) (+ x y))
+
+
+[define ns (current-namespace)]
+
+(struct put-chars ([ch #:mutable]) #:transparent) ; flow of chars to be put
+(struct mixed-series ([item #:mutable]) #:transparent) ; series of mixed item
+
 
 (provide (matching-identifiers-out #rx"^u-" (all-defined-out)))
 (define-macro (u-id ID)
   #'(string->symbol ID))
 
 
-(define-macro (u-atom ITEM...)
-  #'ITEM...)
-(define-macro (u-number NUM...)
-  #'(number->string NUM...))
+
+
+(define-macro (u-number NUM)
+  #'(number->string NUM))
+(define-macro-cases u-atom
+  [(u-atom (u-number NUM)) #'(put-chars (number->string NUM))]
+  [(u-atom "\n") #''newline]
+  [(u-atom HD_CHAR TL_CHAR ...) #'(put-chars (foldr string-append "" `(HD_CHAR TL_CHAR ...)))]
+  [(u-atom X) #'X])
+
 (define-macro (u-converting-num NUM...)
   #'(string->number NUM...))
 
 (define-macro-cases u-expr
+  [(u-expr (u-atom (u-id ID))) #'(string->symbol ID)]
+  [(u-expr (put-chars X)) #'(put-chars X)]
   [(u-expr (u-atom ITEM)) #'ITEM]
+  [(u-expr (u-series SERIES ...)) #'(begin (mixed-series `(,SERIES ...)))] 
   [(u-expr (u-converting-num (u-number NUM))) #'NUM]
   [(u-expr X) #'X])
 
 (define-macro-cases u-sexp
-    [(u-sexp (u-expr (u-atom (u-id "set"))) X Y) #'(set! X Y)]
+    [(u-sexp (u-expr (u-atom (u-id "set"))) (u-expr (u-atom (u-id X))) Y)
+     #'(let ((tmp (string->symbol X))) (namespace-set-variable-value! tmp Y #f ns #f))]
+      [(u-sexp (u-expr (u-atom (u-id "maintext"))) X ...) #'(maintext X ...)]
+      [(u-sexp (u-expr (u-atom (u-id "hd2"))) X) #'(hd2 X)]
     ;[(u-sexp X Y) #'[X Y]]
     [(u-sexp REQ OPT ...)
-     #'(let ([head REQ]
-             (namespace (current-namespace)))
-       (namespace-variable-value head namespace)  OPT ...)]
-  )
+     #'(begin (display (memq 'maintext (namespace-mapped-symbols ns)))
+
+     ((eval REQ ns) (eval OPT ... ns)))])
 
 (define-macro (u-module-begin (u-program LINE ...))
   #'(#%module-begin
+     (init-defs)
     LINE ...))
 
+
+
+
 (provide (rename-out [u-module-begin #%module-begin]))
+(provide maintext)
\ No newline at end of file
diff --git a/parser-test.rkt b/parser-test.rkt
index ff6205a..d502090 100644
--- a/parser-test.rkt
+++ b/parser-test.rkt
@@ -1,10 +1,12 @@
 #lang br
 (require uahgi2/parser uahgi2/tokenizer brag/support)
 (define str #<<Here
+{@display|996}
 {@set|@paperwidth|`2100}
+{@display|@paperwidth}
 {@set|@paperheight|`2970}
 {@set|@textsize|`12.3}
-{@maintext@@
+{@maintext|
 {@hd2|我是貓 I'm a cat}天地人123
 }
 Here
diff --git a/test.rkt b/test.rkt
index 51a3212..1ecf9f2 100644
--- a/test.rkt
+++ b/test.rkt
@@ -1,2 +1,9 @@
 #lang uahgi2
-{@display|210|100}
\ No newline at end of file
+{@display|996}
+{@set|@paperwidth|`2100}
+{@display|@paperwidth}
+{@set|@paperheight|`2970}
+{@set|@textsize|`12.3}
+{@maintext|
+{@hd2|我是貓 I'm a cat}天地人123我是貓
+}
\ No newline at end of file