diff --git a/README.md b/README.md
index 156b5f1..f25418d 100644
--- a/README.md
+++ b/README.md
@@ -75,6 +75,12 @@ We have an [Open Collective](https://opencollective.com/amplifying-fsharp#catego
 
 ![Vagif Abilov](https://www.gravatar.com/avatar/822d40ce216f2d64bcc2c59f0ded1e4d?default=404&s=50) [Vagif Abilov](https://opencollective.com/vagif-abilov)
 
+### Blue hair
+
+```shell
+dotnet fsi blue-hair.fsx
+```
+
 ## The website source code
 
 ### Requirements
diff --git a/blue-hair.fsx b/blue-hair.fsx
new file mode 100644
index 0000000..c33afcf
--- /dev/null
+++ b/blue-hair.fsx
@@ -0,0 +1,47 @@
+#r "nuget: FsHttp"
+
+open System.Collections.Generic
+open FsHttp
+
+Fsi.disableDebugLogs ()
+
+type Transaction = {| createdByUser: obj; amount: int |}
+type OpenCollectiveResponse = {| result: Transaction array |}
+
+let openCollectiveResponse =
+    http {
+        GET
+            "https://opencollective.com/v1/collectives/amplifying-fsharp/transactions?dateFrom=2024-01-01&dateTo=2024-12-31"
+
+        CacheControl "no-cache"
+    }
+    |> Request.send
+    |> Response.deserializeJson<OpenCollectiveResponse>
+
+let total =
+    openCollectiveResponse.result
+    |> Array.map (fun t -> if isNull t.createdByUser then 0 else t.amount)
+    |> Array.sum
+    |> fun sum -> sum / 100
+
+printfn "Total collected: $%i" total
+
+type ExchangeRateResponse = {| rates: Dictionary<string, float> |}
+
+let exchangeRateResponse =
+    http {
+        GET "https://api.frankfurter.app/latest?from=USD&to=GBP"
+        CacheControl "no-cache"
+    }
+    |> Request.send
+    |> Response.deserializeJson<ExchangeRateResponse>
+
+let rate = exchangeRateResponse.rates.["GBP"]
+printfn "Current exchange rate $ to £: %.02f" rate
+
+let totalInPounds = float total * rate
+
+if totalInPounds > 5000 then
+    printfn $"Edgar should have blue hair, raised £%f{totalInPounds}"
+else
+    printfn $"No blue hair yet, currently at £%.02f{totalInPounds}"