diff --git a/sonic-radiance.love/birb/utils/enum.lua b/sonic-radiance.love/birb/utils/enum.lua
new file mode 100644
index 0000000..a9b136e
--- /dev/null
+++ b/sonic-radiance.love/birb/utils/enum.lua
@@ -0,0 +1,9 @@
+return function(tbl)
+    local length = #tbl
+    for i = 1, length do
+        local v = tbl[i]
+        tbl[v] = i
+    end
+
+    return tbl
+end
\ No newline at end of file