diff --git a/lib/blink.js b/lib/blink.js
index c391a9f..29735ed 100644
--- a/lib/blink.js
+++ b/lib/blink.js
@@ -3,5 +3,5 @@ var marked = require('marked')
 module.exports = function (str) {
   var md = marked(str)
   // TODO
-  return null
+  return md.replace(/@@(.*?)@@/g, "<blink>$1</blink>")
 }
\ No newline at end of file
diff --git a/lib/capture.js b/lib/capture.js
index a08ee57..2356719 100644
--- a/lib/capture.js
+++ b/lib/capture.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return str.match((/\d+/g))
 }
\ No newline at end of file
diff --git a/lib/capture_breakword.js b/lib/capture_breakword.js
index a08ee57..a266aeb 100644
--- a/lib/capture_breakword.js
+++ b/lib/capture_breakword.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  let reg = str.match(/\bx=(\d+)\b/)
+  return reg ? reg[1] : null
 }
\ No newline at end of file
diff --git a/lib/quantified_group.js b/lib/quantified_group.js
index a08ee57..c6c2efb 100644
--- a/lib/quantified_group.js
+++ b/lib/quantified_group.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return /^((0x[a-fA-F\d]{2})\s+){8}$/.test(str)
 }
\ No newline at end of file
diff --git a/lib/quotes.js b/lib/quotes.js
index a08ee57..b82e775 100644
--- a/lib/quotes.js
+++ b/lib/quotes.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return str.match(/".*?"/g)
 }
\ No newline at end of file