1 files changed, 12 insertions, 0 deletions
diff --git a/challenge-070/lubos-kolouch/javascript/ch-2.js b/challenge-070/lubos-kolouch/javascript/ch-2.js
new file mode 100644
index 0000000000..44602ebfca
--- /dev/null
+++ b/challenge-070/lubos-kolouch/javascript/ch-2.js
@@ -0,0 +1,12 @@
+const N = 4;
+let grayCode = ['0', '1'];
+
+for (let i = 2; i <= N; i++) {
+    let revGrayCode = grayCode.slice().reverse();
+    grayCode = grayCode.map(x => '0' + x);
+    revGrayCode = revGrayCode.map(x => '1' + x);
+    grayCode = grayCode.concat(revGrayCode);
+}
+
+grayCode = grayCode.map(x => parseInt(x, 2));
+console.log(grayCode);