diff --git a/lib/blink.js b/lib/blink.js
index c391a9f..702e708 100644
--- a/lib/blink.js
+++ b/lib/blink.js
@@ -1,7 +1,7 @@
 var marked = require('marked')
 
 module.exports = function (str) {
-  var md = marked(str)
+  var md = marked(str);
   // TODO
-  return null
+  return md.replace(/@@(.*?)@@+/g, '<blink>$1</blink>')
 }
\ No newline at end of file
diff --git a/lib/capture.js b/lib/capture.js
index a08ee57..10c3803 100644
--- a/lib/capture.js
+++ b/lib/capture.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  const arr = str.match(/x=(\d+)/);
+  return arr ? arr[0].split('x=')[1] : null;
 }
\ No newline at end of file
diff --git a/lib/capture_breakword.js b/lib/capture_breakword.js
index a08ee57..af1242a 100644
--- a/lib/capture_breakword.js
+++ b/lib/capture_breakword.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  const arr = str.match(/\b(x=(\d+)\b)/);
+  return arr ? arr[0].split('x=')[1] : null;
 }
\ No newline at end of file
diff --git a/lib/quantified_group.js b/lib/quantified_group.js
index a08ee57..c526587 100644
--- a/lib/quantified_group.js
+++ b/lib/quantified_group.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  const regExp = /^(0x[a-zA-Z0-9]{2}\s+){8}$/g;
+  return regExp.test(str);
 }
\ No newline at end of file
diff --git a/lib/quotes.js b/lib/quotes.js
index a08ee57..372ecd9 100644
--- a/lib/quotes.js
+++ b/lib/quotes.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  const arr = str.match(/\"([^\"]*)\"+/g);
+  return arr;
 }
\ No newline at end of file