diff --git a/.eslintrc.json b/.eslintrc.json
index db814bf..b2cf6db 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,3 +1,6 @@
 {
- "extends": "hrundel/node"
+ "extends": "hrundel/node",
+ "parserOptions": {
+ "ecmaVersion": 6
+ }
 }
diff --git a/roman-time.js b/roman-time.js
index f66353e..d321959 100644
--- a/roman-time.js
+++ b/roman-time.js
@@ -5,8 +5,40 @@
 * @returns {String} – время римскими цифрами (IX:V)
 */
 function romanTime(time) {
- // Немного авторского кода и замечательной магии
- return time;
+ if (isValid(time) === false) {
+ throw new TypeError();
+ }
+
+ var hours = time.split(':')[0];
+ var minutes = time.split(':')[1];
+
+ var romanHours = toRoman(hours);
+ var romanMinutes = toRoman(minutes);
+
+ return romanHours + ':' + romanMinutes;
+}
+
+function isValid(time) {
+ var timeFormatRegExp = /^([0-1][0-9])|(2[0-3]):[0-5][0-9]$/;
+ if (typeof time === 'string' && timeFormatRegExp.test(time) === true) {
+ return true;
+ }
+
+ return false;
+}
+
+function toRoman(number) {
+ if (number === '00') {
+ return 'N';
+ }
+
+ var romanDictTens = { '0': '', '1': 'X', '2': 'XX', '3': 'XXX', '4': 'XL', '5': 'L' };
+ var romanDictOnes = { '0': '', '1': 'I', '2': 'II', '3': 'III', '4': 'IV',
+ '5': 'V', '6': 'VI', '7': 'VII', '8': 'VIII', '9': 'IX' };
+
+ var digits = number.split('');
+
+ return romanDictTens[digits[0]] + romanDictOnes[digits[1]];
 }
 
 module.exports = romanTime;
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