diff --git a/sonicpi/ff-prelude-arpeggios.rb b/sonicpi/ff-prelude-arpeggios.rb
new file mode 100644
index 0000000..5d1c1b2
--- /dev/null
+++ b/sonicpi/ff-prelude-arpeggios.rb
@@ -0,0 +1,52 @@
+# Welcome to Sonic Pi v3.1
+
+use_bpm 100
+
+with_fx :reverb, room: 0.85, damp: 0.8 do
+  with_fx :echo, pre_mix: 0.6, mix: 0.4, phase: 0.5, decay: 0.8 do
+    live_loop :updown do
+      use_synth :sine
+      
+      progression = [[:c4, :major],
+                     [:a3, :minor],
+                     [:c4, :major],
+                     [:a3, :minor],
+                     [:f3, :major],
+                     [:g3, :major]]
+      arpeggio = [0, 1, 2, 4]
+      
+      num_octaves = 4
+      duration = 0.25
+      
+      progression.each do |chord|
+        scale_notes = scale chord[0], chord[1] # encode this...
+        
+        num_octaves.times do |oct|
+          puts "octave: #{oct}"
+          arpeggio.each do |note|
+            play scale_notes[note] + oct*12
+            sleep duration
+          end
+        end
+        
+        # Top note of the arpeggio is the tonic.
+        play scale_notes[0] + num_octaves*12
+        sleep duration
+        
+        (num_octaves-1).times do |oct|
+          puts "octave: #{oct}"
+          arpeggio.reverse_each do |note|
+            play scale_notes[note] + (num_octaves-oct-1)*12
+            sleep duration
+          end
+        end
+        
+        # Play the last octave separately 'cause it's different from the rest.
+        arpeggio.select { |a| a != 1 }.reverse_each do |note|
+          play scale_notes[note]
+          sleep duration
+        end
+      end
+    end
+  end
+end
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