-- |
-- Simple canon on a familiar subject.
-- 
import Music.Prelude

frere = mempty
  |> times 2 (scat [c,d,e,c]^/4) 
  |> times 2 (scat [e,f,g^*2]^/4) 
  |> times 2 (scat [g,a,g,f,scat [e,c]^*2]^/8)
  |> times 2 (scat [c,g_,c^*2]^/4)

frere2 = delay 2 frere </> frere
frere4 = delay 4 frere2 </> frere2

info = title "Frere Jaques" . composer "Trad." . tempo (metronome (1/4) 120)
main = open $ info $ asScore $ frere4