diff --git a/package.json b/package.json
index 1b4599b..28d1db3 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,8 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
+    "chalk": "^1.1.1",
+    "moment": "^2.11.1",
     "pragmatist": "^3.0.3"
   },
   "dependencies": {
diff --git a/src/bin/create-index.js b/src/bin/create-index.js
index e1a49bf..e02b411 100644
--- a/src/bin/create-index.js
+++ b/src/bin/create-index.js
@@ -2,7 +2,7 @@
 
 import yargs from 'yargs';
 import {
-    writeIndex
+    writeIndexCli
 } from './../utilities';
 
 let argv;
@@ -11,8 +11,4 @@ argv = yargs
     .demand(1)
     .argv;
 
-writeIndex(argv._);
-
-/* eslint-disable no-console */
-console.log('OK!');
-/* eslint-enable no-console */
+writeIndexCli(argv._);
diff --git a/src/utilities/index.js b/src/utilities/index.js
index 355b256..66da76d 100644
--- a/src/utilities/index.js
+++ b/src/utilities/index.js
@@ -1,8 +1,10 @@
 'create index';
 
 export createIndexCode from './createIndexCode.js';
+export log from './log.js';
 export readDirectory from './readDirectory.js';
 export sortByDepth from './sortByDepth.js';
 export validateTargetDirectory from './validateTargetDirectory.js';
 export writeIndex from './writeIndex.js';
+export writeIndexCli from './writeIndexCli.js';
 
diff --git a/src/utilities/log.js b/src/utilities/log.js
new file mode 100644
index 0000000..3c9ffec
--- /dev/null
+++ b/src/utilities/log.js
@@ -0,0 +1,8 @@
+import chalk from 'chalk';
+import moment from 'moment';
+
+export default (...append) => {
+    /* eslint-disable no-console */
+    console.log(chalk.dim('[' + moment().format('HH:mm:ss') + ']'), ...append);
+    /* eslint-enable no-console */
+};
diff --git a/src/utilities/writeIndexCli.js b/src/utilities/writeIndexCli.js
new file mode 100644
index 0000000..ef5c566
--- /dev/null
+++ b/src/utilities/writeIndexCli.js
@@ -0,0 +1,54 @@
+import _ from 'lodash';
+import createIndexCode from './createIndexCode';
+import fs from 'fs';
+import path from 'path';
+import validateTargetDirectory from './validateTargetDirectory';
+import readDirectory from './readDirectory';
+import sortByDepth from './sortByDepth';
+import log from './log';
+import chalk from 'chalk';
+
+export default (directoryPaths) => {
+    let sortedDirectoryPaths;
+
+    sortedDirectoryPaths = sortByDepth(directoryPaths);
+
+    log('Target directories', sortedDirectoryPaths);
+
+    _.forEach(sortedDirectoryPaths, (directoryPath) => {
+        validateTargetDirectory(directoryPath);
+    });
+
+    _.forEach(sortedDirectoryPaths, (directoryPath) => {
+        let existingIndexCode,
+            indexCode,
+            indexFilePath,
+            siblings;
+
+        siblings = readDirectory(directoryPath);
+
+        indexCode = createIndexCode(siblings);
+
+        indexFilePath = path.resolve(directoryPath, 'index.js');
+
+        try {
+            existingIndexCode = fs.readFileSync(indexFilePath, 'utf8');
+        /* eslint-disable no-empty */
+        } catch (error) {
+
+        }
+        /* eslint-enable no-empty */
+
+        fs.writeFileSync(indexFilePath, indexCode);
+
+        if (existingIndexCode && existingIndexCode === indexCode) {
+            log(indexFilePath, chalk.yellow('[index have not changed]'));
+        } else if (existingIndexCode && existingIndexCode !== indexCode) {
+            log(indexFilePath, chalk.green('[updated index]'));
+        } else {
+            log(indexFilePath, chalk.green('[created index]'));
+        }
+    });
+
+    log('Done');
+};
diff --git a/tests/writeIndex.js b/tests/writeIndex.js
index 0a0dba3..825a850 100644
--- a/tests/writeIndex.js
+++ b/tests/writeIndex.js
@@ -19,9 +19,11 @@ describe('writeIndex()', () => {
 
         try {
             fs.unlinkSync(indexFilePath);
+        /* eslint-disable no-empty */
         } catch (error) {
 
         }
+        /* eslint-enable no-empty */
 
         writeIndex([path.resolve(fixturesPath, './mixed')]);