diff --git a/index.html b/index.html
index f362142..e1ea013 100644
--- a/index.html
+++ b/index.html
@@ -1,76 +1,92 @@
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- Pixel Icons
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- GitHub
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+ document.documentElement.dataset.theme = light ? 'light' : 'dark';
+
+ document.querySelector('#btn-theme').addEventListener('click', e => {
+ light = !light;
+ document.documentElement.dataset.theme = light ? 'light' : 'dark';
+ });
+ })()
+
+