diff --git a/abp/fancy.py b/abp/fancy.py
index 9df3209..d340412 100644
--- a/abp/fancy.py
+++ b/abp/fancy.py
@@ -23,6 +23,8 @@ class GraphState(graphstate.GraphState, networkx.Graph):
 
     def shutdown(self):
         """ Close the connection to the websocket """
+        if not self.ws:
+            return
         self.update()
         self.ws.close()
 
diff --git a/abp/server.py b/abp/server.py
index 8964415..e450444 100644
--- a/abp/server.py
+++ b/abp/server.py
@@ -21,7 +21,7 @@ def client_left(client, server):
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description = "ABP websocket server")
-    parser.add_argument("-v", action="store_true", help="Launch browser")
+    parser.add_argument("-v", action="store_false", help="Launch browser")
     args = parser.parse_args()
 
     # Change to the right working dir
diff --git a/examples/stress_test.py b/examples/stress_test.py
index e9d7ce0..e239c5f 100644
--- a/examples/stress_test.py
+++ b/examples/stress_test.py
@@ -4,11 +4,12 @@ import numpy as np
 import time
 import itertools
 
-square_unit_cell = (
-    ((0, 0), (0, 1)), ((0, 0), (1, 0)), ((1, 0), (1, 1)), ((0, 1), (1, 1)))
-funny_unit_cell = (((0, 0), (0, 1)), ((0, 0), (1, 0)),
-                   ((1, 0), (1, 1)), ((0, 1), (1, 1)), ((0, 0), (.5, .5)))
-
+threedee_unit_cell = (
+     (( 0, 0, 0),    (0, 1, 0)),
+     (( 0, 0, 0),    (1, 0, 0)),
+     (( 1, 0, 0),    (1, 1, 0)),
+     (( 0, 1, 0),    (1, 1, 0)))
+        )
 
 def add_offset(vector, offset):
     """ Offset a vector in n-dimensional space """
@@ -29,7 +30,7 @@ def lattice(unit_cell, size):
     nodes = set(itertools.chain(*edges))
     return nodes, edges
 
-nodes, edges = lattice(funny_unit_cell, (4, 4))
+nodes, edges = lattice(threedee_unit_cell, (4, 4, 4))
 
 for j in range(100):
     psi = GraphState()
diff --git a/examples/threedee.py b/examples/threedee.py
new file mode 100644
index 0000000..bcbc178
--- /dev/null
+++ b/examples/threedee.py
@@ -0,0 +1,53 @@
+from abp.fancy import GraphState
+from abp.util import xyz
+import numpy as np
+import time
+import itertools
+
+threedee_unit_cell = (
+     (( 0, 0, 0),    (0, 1, 0)),
+     (( 0, 0, 0),    (1, 0, 0)),
+     (( 1, 0, 0),    (1, 1, 0)),
+     (( 0, 1, 0),    (1, 1, 0)),
+
+     (( 0, 0, 1),    (0, 1, 1)),
+     (( 0, 0, 1),    (1, 0, 1)),
+     (( 1, 0, 1),    (1, 1, 1)),
+     (( 0, 1, 1),    (1, 1, 1)),
+
+     (( 0, 0, 0),    (0, 0, 1)),
+     (( 0, 1, 0),    (0, 1, 1)),
+     (( 1, 0, 0),    (1, 0, 1)),
+     (( 1, 1, 0),    (1, 1, 1))
+     )
+
+def add_offset(vector, offset):
+    """ Offset a vector in n-dimensional space """
+    return tuple(v + o for v, o in zip(vector, offset))
+
+
+def offset_unit_cell(unit_cell, offset):
+    """ Offset a unit cell """
+    return {(add_offset(a, offset), add_offset(b, offset)) for a, b in unit_cell}
+
+
+def lattice(unit_cell, size):
+    """ Generate a lattice from a unit cell """
+    edges = set()
+    for offset in itertools.product(*map(range, size)):
+        edges |= offset_unit_cell(unit_cell, offset)
+
+    nodes = set(itertools.chain(*edges))
+    return nodes, edges
+
+nodes, edges = lattice(threedee_unit_cell, (4, 4, 4))
+
+psi = GraphState()
+for node in nodes:
+    psi.add_node(str(node), position=xyz(*node))
+    psi.act_hadamard(str(node))
+
+for edge in edges:
+    psi.act_cz(str(edge[0]), str(edge[1]))
+
+
diff --git a/static/scripts/materials.js b/static/scripts/materials.js
index d9e2cf2..1d6ad4a 100644
--- a/static/scripts/materials.js
+++ b/static/scripts/materials.js
@@ -11,7 +11,7 @@ materials.prepare = function() {
     materials.edge = new THREE.LineBasicMaterial({
         color: "gray",
         transparent: false,
-        linewidth: 3
+        linewidth: 2
     });
     materials.qubit = new THREE.PointsMaterial({
         size: 0.5,