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+#Sing along with great jubilation and excitement!!
+
+#globals
+##keys to switch between. Don't think it will work with
+##can work with other keys but transposition might be off
+##Probably works best when keys are a fourth apart
+keys = [:D4, :A3]
+relative = [:minor, :major]
+
+#works well with :mod_square, :mod_saw, etc
+use_synth :mod_sine
+
+in_thread do
+  
+  # locals
+  idx = 0
+  deg = 1
+  rel =  relative[0]
+  
+  
+  define :next_chord do |root|
+    #minor rules
+    if rel == relative[0]
+      if root == 1
+        return choose([2,3,4,6,7])
+      end
+      if root == 2
+        return 5
+      end
+      if root == 3
+        return choose ([4,6])
+      end
+      if root == 4
+        return choose ([2,5])
+      end
+      if root == 5
+        n=2
+        n=choose([1,2,6])
+        if n == 2
+          idx = 1
+          rel = relative[1]
+          return 5
+        end
+        return n
+      end
+      if root == 6
+        #also nice with 7 surprisingly!
+        return choose([4,7])
+      end
+      if root == 7
+        return 3
+      end
+    end
+    
+    ##major rules
+    if rel == relative[1]
+      if root == 1
+        n = choose([2,3,4,5,6])
+        return n
+      end
+      if root == 2
+        #technically iv is not normative,
+        #but this establishes the key better
+        #with the D major chord
+        #plus every progression must have some regression
+        #to make a convincing plot :)
+        return choose([4,5])
+      end
+      if root == 3
+        return choose ([4,6])
+      end
+      if root == 4
+        return choose ([1,2,5])
+      end
+      if root == 5
+        n=choose([1,2,6])
+        if n == 2
+          idx = 0
+          rel = relative[0]
+          return 5
+        end
+        return n
+      end
+      if root == 6
+        return 4
+      end
+    end
+  end
+  
+  with_fx :compressor, amp: 0.7 do
+    live_loop :infinite_progression do
+      puts deg
+      puts keys[idx]
+      puts rel
+      4.times do
+        if deg == 5 and rel == relative[0]
+          2.times do
+            play (chord_degree deg, keys[idx], :harmonic_minor, 3), amp: 0.6, sustain: 0.1
+            sleep 0.5
+          end
+        else
+          play (chord_degree deg, keys[idx], rel, 3), amp: 0.6, sustain: 0.1
+          sleep 0.5
+        end
+        
+      end
+      deg = next_chord deg
+    end
+    
+  end
+end
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