add examples

examples/hydraswap.js

@@ -0,0 +1,26 @@
+
+await initHydra() 
+
+let bass = note("<C3 Eb3 G2 Bb2>").euclid(3,8).s("sawtooth").lpf(sine.range(400, 1000))
+let kick = s("<[bd ~ ~ bd]!3 [bd(5,8,1)]> ")
+let hihat = s("hh!6 [hh*2 hh]!2").slow(2)
+let final = stack(note("c3@4, c2@4").s("sawtooth").lpf(1000), 
+                  s("cr")).delay(.5).delaytime(".75")
+let silence = s("bd").hush()
+
+let sequence = "0@4 1@4 2@8 3 4@7".slow(24)
+
+solid(0,0,0)
+.add(osc(10, 0.1, 10)  ,H(sequence.pick([1,0,0,1])))
+.add(noise()           ,H(sequence.pick([0,1,0,1])))
+.add(shape()           ,H(sequence.pick([0,0,1,0])))
+.out()
+             
+sequence.pick([ bass,                   // = 0
+                stack(bass, kick),      // = 1
+                stack(bass,kick,hihat), // = 2
+                final,                  // = 3
+                silence])               // = 4 
+
+
+