diff --git a/src/parser/core-parser.pegjs b/src/parser/core-parser.pegjs
index 5f48929..3a7a773 100644
--- a/src/parser/core-parser.pegjs
+++ b/src/parser/core-parser.pegjs
@@ -1,99 +1,166 @@
-start = root
+{
+	function buildList(head, others) {
+		return [ head, ...others ];
+	}
 
-// general
+	function createTree(type, props, children) {
+		props = props || { };
+		children = children || [ ];
+		children = !Array.isArray(children) ? [children] : children;
 
-space
-	= [ \t]
-lineBreak
-	= "\n" / "\r\n" / "\r"
-spacing
-	= space / lineBreak
-
-// titile
-
-title_nestContent
-	= inline
-
-titleA_char
-	= !(title_nestContent / lineBreak / "】") c:. { return c; }
-
-titleA_text
-	= t:$(titleA_char+) { return t; }
-
-titleA_content
-	= (title_nestContent / titleA_text)+
-
-titleA
-	= "【" titleA_content "】"
-
-titleB_char
-	= !(title_nestContent / lineBreak / "]") c:. { return c; }
-
-titleB_text
-	= t:$(titleB_char+) { return t; }
-
-titleB_content
-	=  (title_nestContent / titleB_text)+
-
-titleB
-	= "[" titleB_content "]"
-
-title
-	= titleA / titleB
-
-// blockCode
-
-blockCode_char
-	= !(lineBreak / "```") c:. { return c; }
-
-blockCode_line
-	= t:$(blockCode_char*) lineBreak { return t; }
-
-blockCode
-	= "```" lineBreak blockCode_line* "```"
-
-// parts
-
-// plain
-// 	= emoji
-// 	/ text
-
-// block
-// 	= title
-// 	/ quote
-// 	/ search
-// 	/ blockCode
-// 	/ mathBlock
-// 	/ center
-
-// inline
-// 	= big
-// 	/ bold
-// 	/ small
-// 	/ italic
-// 	/ strike
-// 	/ motion
-// 	/ spin
-// 	/ jump
-// 	/ flip
-// 	/ inlineCode
-// 	/ mathInline
-// 	/ mention
-// 	/ hashtag
-// 	/ url
-// 	/ link
-// 	/ plain
-
-// root
-// 	= block
-// 	/ inline
-
-block
-	= title
-	/ blockCode
-
-inline = "inline"
+		return {
+			node: { type, props },
+			children: children
+		};
+	}
+}
 
 root
 	= block
 	/ inline
+
+// plain
+// 	=
+
+block
+	= title
+	/ quote
+	/ search
+	/ blockCode
+
+inline
+	= big
+
+
+// block: title
+
+title
+	= titleA / titleB
+
+titleA
+	= "【" content:titleA_content "】"
+{
+	return createTree('title', { }, content);
+}
+
+titleA_content
+	= (inline / titleA_text)+
+
+titleA_text
+	= s:$(titleA_char+)
+{
+	return createTree('text', { text: s });
+}
+
+titleA_char
+	= !(inline / "】") c:CHAR { return c; }
+
+titleB
+	= "[" content: titleB_content "]"
+{
+	return createTree('title', { }, content);
+}
+
+titleB_content
+	= (inline / titleB_text)+
+
+titleB_text
+	= s:$(titleB_char+)
+{
+	return createTree('text', { text: s });
+}
+
+titleB_char
+	= !(inline / "]") c:CHAR { return c; }
+
+
+// block: quote
+// (handle the line as quote block if got a char ">" of the line head.)
+
+quote
+	= head:quote_line tail:(NEWLINE tree:quote_line { return tree; })*
+{
+	const trees = [head, ...tail];
+	console.log(trees.map(tree => tree.children));//.flat();
+	return [head, ...tail].join('\n');
+}
+
+quote_line
+	= ">" content:quote_content &ENDLINE { return createTree('quote', { }, content); }
+
+// TODO: allow nesting
+quote_content
+	= quote_text
+
+quote_text
+	= s:$(CHAR+) { return createTree('text', { text: s }); }
+
+
+// block: search
+
+search
+	= q:search_query sp:[ 　\t] key:search_keyToken &ENDLINE
+{
+	return createTree('search', {
+		query: q,
+		content: [ q, sp, key ].join('')
+	});
+}
+
+search_query =
+	head:CHAR tail:(!([ 　\t] search_keyToken ENDLINE) c:CHAR { return c; })*
+{
+	return head + tail.join('');
+}
+
+search_keyToken
+	= "検索" / "search"i
+
+
+// block: blockCode
+
+blockCode
+	= "```" NEWLINE lines: (!("```" ENDLINE) line:blockCode_line NEWLINE { return line; } )* "```" &ENDLINE { return lines; }
+
+// TODO: allow nesting
+blockCode_line
+	= t:$(CHAR*) { return t; }
+
+
+// inline: big
+
+big
+	= "***" content:big_content "***"
+{
+	return createTree('big', { }, content);
+}
+
+big_content
+	= (big_text / inline)*
+
+big_text
+	= s:$(big_char+) { return createTree('text', { text: s }); }
+
+big_char
+	= !("***") c:CHAR { return c; }
+
+
+// Core rules
+
+CHAR
+	= !NEWLINE c:. { return c; }
+
+ENDLINE
+	= NEWLINE / EOF
+
+NEWLINE
+	= "\r\n" / [\r\n]
+
+EOF
+	= !.
+
+// __ "whitespaces"
+// 	= _+
+
+// _ "whitespace"
+// 	= [ \t]