diff --git a/lib/blink.js b/lib/blink.js
index c391a9f..b384337 100644
--- a/lib/blink.js
+++ b/lib/blink.js
@@ -3,5 +3,6 @@ var marked = require('marked')
 module.exports = function (str) {
   var md = marked(str)
   // TODO
-  return null
-}
\ No newline at end of file
+   var regex = /@@([\w\W]+?)@@/g;
+    return md.replace(regex, '<blink>$1</blink>');
+}
diff --git a/lib/capture.js b/lib/capture.js
index a08ee57..0119017 100644
--- a/lib/capture.js
+++ b/lib/capture.js
@@ -1,3 +1,7 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+   var regex = /(\d+)\b/;
+    var arr = regex.exec(str);
+    return arr ? arr[0] : null;
+  
+}
diff --git a/lib/capture_breakword.js b/lib/capture_breakword.js
index a08ee57..66684af 100644
--- a/lib/capture_breakword.js
+++ b/lib/capture_breakword.js
@@ -1,3 +1,6 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+   var regex = /(?<=\bx=)\d+\b/g;
+    var arr = regex.exec(str);
+    return arr ? arr[0] : null;
+}
diff --git a/lib/quantified_group.js b/lib/quantified_group.js
index a08ee57..277197e 100644
--- a/lib/quantified_group.js
+++ b/lib/quantified_group.js
@@ -1,3 +1,6 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+  var regex = /^(0x[a-fA-F0-9]{2}\s+){8}$/;
+    var arr = regex.exec(str);
+    return arr ? arr[0] : null;
+}
diff --git a/lib/quotes.js b/lib/quotes.js
index a08ee57..eedab71 100644
--- a/lib/quotes.js
+++ b/lib/quotes.js
@@ -1,3 +1,6 @@
 module.exports = function (str) {
   // TODO
-}
\ No newline at end of file
+  var regex = /"([\S\s]*?)"/g;
+    var arr = str.match(regex);
+    return arr;
+}