2 files changed, 25 insertions, 1 deletions
diff --git a/website/sandbox/chord-drill-sergeant/default.nix b/website/sandbox/chord-drill-sergeant/default.nix
new file mode 100644
index 000000000000..7ea92c29f5c1
--- /dev/null
+++ b/website/sandbox/chord-drill-sergeant/default.nix
@@ -0,0 +1,24 @@
+{ pkgs, ... }:
+
+pkgs.stdenv.mkDerivation {
+  name = "learn-piano-chords";
+  src = ./.;
+  buildInputs = with pkgs; [
+    elmPackages.elm
+    nodejs
+  ];
+  outputHashMode = "recursive";
+  outputHashAlgo = "sha256";
+  outputHash = "0diya7q8ird56jsbf2p49fyvldsay6m9z251zr2rq1i4qs7idy0j";
+  phases = [ "unpackPhase" "buildPhase" ];
+  buildPhase = ''
+    export NIX_REDIRECTS=/etc/protocols=${pkgs.iana-etc}/etc/protocols
+    export LD_PRELOAD=${pkgs.libredirect}/lib/libredirect.so
+    export SYSTEM_CERTIFICATE_PATH=${pkgs.cacert}/etc/ssl/certs
+
+    mkdir -p $out
+    cp index.html $out
+    elm make src/Main.elm --optimize --output=$out/elm.js
+    npx tailwindcss build index.css -o $out/output.css
+  '';
+}
diff --git a/website/sandbox/chord-drill-sergeant/src/Main.elm b/website/sandbox/chord-drill-sergeant/src/Main.elm
index c4c7a36653a2..054d318a08b1 100644
--- a/website/sandbox/chord-drill-sergeant/src/Main.elm
+++ b/website/sandbox/chord-drill-sergeant/src/Main.elm
@@ -123,7 +123,7 @@ init =
     , whitelistedKeys = keys
     , selectedChord = Nothing
     , isPaused = True
-    , tempo = 30
+    , tempo = 20
     , firstNote = firstNote
     , lastNote = lastNote
     , view = Preferences