diff --git a/foomo/docs/backend/go-by-example/ranging.mdx b/foomo/docs/backend/go-by-example/ranging.mdx
new file mode 100644
index 0000000..afb6781
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+++ b/foomo/docs/backend/go-by-example/ranging.mdx
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+import { GoPlayground } from '../../../src/components/GoPlayground';
+# ranging and looping
+
+<GoPlayground 
+    id="_zMEwPV3pLD" 
+    proportion={16/10}
+/>
+