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diff --git a/website/sandbox/chord-drill-sergeant/src/Tempo.elm b/website/sandbox/chord-drill-sergeant/src/Tempo.elm
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+++ b/website/sandbox/chord-drill-sergeant/src/Tempo.elm
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+module Tempo exposing (render)
+
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+
+type alias Props msg =
+  { tempo : Int
+  , handleIncrease : msg
+  , handleDecrease : msg
+  , handleInput : String -> msg
+  }
+
+render : Props msg -> Html msg
+render {tempo, handleIncrease, handleDecrease, handleInput} =
+  div [] [ p [] [ text ((String.fromInt tempo) ++ " BPM") ]
+         , button [ onClick handleDecrease ] [ text "Slower" ]
+         , input [ onInput handleInput
+                 , placeholder "Set tempo..."
+                 ] []
+         , button [ onClick handleIncrease ] [ text "Faster" ]
+         ]