diff --git a/interactions.py b/interactions.py
index e5c8084..a35830d 100644
--- a/interactions.py
+++ b/interactions.py
@@ -1,6 +1,8 @@
+#!/usr/bin/python3
+
 from math import pi, cos, sin, exp
 
-import pygame, colorsys
+import phue, pygame, colorsys
 
 # === graph data ===
 
@@ -12,7 +14,7 @@ vertices = [(viewsize*(1 + shrink*x)/2, viewsize*(1 + shrink*y)/2) for x, y in
 ]
 
 # edges as vertex pairs. FireStar will rest on vertices 6 (A), 5 (B), 7 (C)
-edges = [
+vertex_adj = [
   (0, 1), (0, 3), (0, 5), (0, 7), (0, 9),
   (2, 8), (2, 6), (6, 10), (10, 4), (4, 8),
   (2, 9), (2, 11), (2, 5),
@@ -41,6 +43,50 @@ cyc_edge_adj = [
   (14, 11), (11, 23), (23, 20), (20, 17), (17, 14)
 ]
 
+# === pygame setup ===
+
+pygame.init()
+screen = pygame.display.set_mode((viewsize, viewsize + 100))
+pygame.display.set_caption('Preview')
+font = pygame.font.Font(None, 25)
+clock = pygame.time.Clock()
+
+# === bridge setup and control ===
+
+# --- copied from firestar.py
+
+b = phue.Bridge('172.18.130.12')
+##b = None
+Nedges = 30;
+edgecode = [None] * Nedges;
+
+# The edges are numbered as in info/SSDedges.obj; enter the two-letter code for
+# the lightstrip inserted through each edge in the block below:
+
+exec(open("edgecodes.py").read())
+
+if b != None:
+  edges = [ b[code] for code in edgecode ]
+
+lasthue = 65535
+fullbright = 254
+fullsat = 254
+
+# --- control methods
+
+def set_light_hsv(edge, color):
+  if b != None:
+    b.set_light(
+      edges[edge].light_id,
+      {
+        'hue' : color[0]*lasthue,
+        'bri' : color[2]*fullbright,
+        'sat' : color[1]*fullsat
+      }
+    )
+  rgb_color = tuple(255*c for c in colorsys.hsv_to_rgb(*color))
+  pygame.draw.aaline(screen, rgb_color, vertices[vertex_adj[edge][0]], vertices[vertex_adj[edge][1]])
+
 # === interaction parameters ===
 
 frame_rate = 24
@@ -71,10 +117,10 @@ def wave_evolution():
   # use verlet integration, first updating the currents and then using the new
   # currents to update the charges.
   for e in range(30):
-    u, v = edges[e]
+    u, v = vertex_adj[e]
     current[e] += inductance*(charge[u] - charge[v])
   for e in range(30):
-    u, v = edges[e]
+    u, v = vertex_adj[e]
     charge[u] -= current[e]
     charge[v] += current[e]
   if drain:
@@ -93,13 +139,6 @@ def show_data(screen):
   screen.blit(text, (120, 30 + viewsize))
 
 if __name__ == '__main__':
-  # set up display and clock
-  pygame.init()
-  screen = pygame.display.set_mode((viewsize, viewsize + 100))
-  pygame.display.set_caption('Preview')
-  font = pygame.font.Font(None, 25)
-  clock = pygame.time.Clock()
-  
   # set up background
   background = pygame.Surface(screen.get_size()).convert()
   background.fill((32, 32, 32))
@@ -137,14 +176,7 @@ if __name__ == '__main__':
     # show state
     for e in range(30):
       litness = 1 - exp(-2*current[e]*current[e])
-      color = colorsys.hsv_to_rgb(0.45 + litness*0.25, 1 - 0.5*litness*litness, litness)
-      ##color = colorsys.hsv_to_rgb(litness*0.167, 1 - 0.5*litness*litness, litness)
-      pygame.draw.aaline(
-        screen,
-        tuple(255*c for c in color),
-        vertices[edges[e][0]],
-        vertices[edges[e][1]],
-      )
+      set_light_hsv(e, (0.45 + litness*0.25, 1 - 0.5*litness*litness, litness))
     
     # evolve state
     wave_evolution()