diff --git a/first-setup b/first-setup
index 74c23fa..91a5ae1 100644
--- a/first-setup
+++ b/first-setup
@@ -13,6 +13,7 @@
 		return "Error! this probably cause from unknown vendor or a connection problem"
 	}
 }
+#source: https://s.id/q4f-O
 global ConvertLowerCase do={
 	local alphabet {"A"="a";"B"="b";"C"="c";"D"="d";"E"="e";"F"="f";"G"="g";"H"="h";"I"="i";"J"="j";"K"="k";"L"="l";"M"="m";"N"="n";"O"="o";"P"="p";"Q"="q";"R"="r";"S"="s";"T"="t";"U"="u";"V"="v";"X"="x";"Z"="z";"Y"="y";"W"="w"};
 	local result
@@ -47,4 +48,4 @@ global CheckConnection do={
 			set $ConnectionAvailable [tobool false]
 		}
 	}
-}
\ No newline at end of file
+}