diff --git a/axi/__init__.py b/axi/__init__.py
index 1e8d3d7..d25e68d 100644
--- a/axi/__init__.py
+++ b/axi/__init__.py
@@ -1,6 +1,6 @@
 from .device import Device
 from .drawing import Drawing
-from .paths import simplify_paths, sort_paths, join_paths
+from .paths import simplify_paths, sort_paths, join_paths, load_paths
 from .planner import Planner
 from .turtle import Turtle
 from .util import draw, reset
diff --git a/axi/device.py b/axi/device.py
index 0143cb1..64a9f97 100644
--- a/axi/device.py
+++ b/axi/device.py
@@ -8,9 +8,9 @@ from serial.tools.list_ports import comports
 
 from .planner import Planner
 
-TIMESLICE_MS = 10
+TIMESLICE_MS = 20
 
-MICROSTEPPING_MODE = 1
+MICROSTEPPING_MODE = 2
 STEP_DIVIDER = 2 ** (MICROSTEPPING_MODE - 1)
 
 STEPS_PER_INCH = 2032 / STEP_DIVIDER
@@ -26,7 +26,7 @@ PEN_DOWN_DELAY = 0
 
 ACCELERATION = 8
 MAX_VELOCITY = 8
-CORNER_FACTOR = 0.005
+CORNER_FACTOR = 0.0005
 
 VID_PID = '04D8:FD92'
 
diff --git a/axi/paths.py b/axi/paths.py
index 72c87c6..c90dc16 100644
--- a/axi/paths.py
+++ b/axi/paths.py
@@ -3,6 +3,17 @@ from shapely.geometry import LineString
 
 from .spatial import Index
 
+def load_paths(filename):
+    paths = []
+    with open(filename) as fp:
+        for line in fp:
+            points = filter(None, line.strip().split(';'))
+            if not points:
+                continue
+            path = [tuple(map(float, x.split(','))) for x in points]
+            paths.append(path)
+    return paths
+
 def simplify_path(points, tolerance):
     if len(points) < 2:
         return points
diff --git a/examples/growth.py b/examples/growth.py
index 7bb1b38..edcfc07 100644
--- a/examples/growth.py
+++ b/examples/growth.py
@@ -49,15 +49,23 @@ class Grid(object):
         self.lines.pop((i, j))
 
 def max_angle(i, d):
+    if d < 0.1:
+        return pi
+    return pi / 4
     a1 = 2 * pi
     a2 = pi / 2
     p = min(1, d / 20.0)
     p = p ** 0.5
     return a1 + (a2 - a1) * p
 
+def new_angle(a, d):
+    if d < 0.1:
+        return random.random() * 2 * pi
+    else:
+        return random.gauss(a, pi / 10)
+
 def choice(items):
-    # return random.choice(items)
-    p = random.random() ** 0.1
+    p = random.random() ** 0.5
     return items[int(p * len(items))]
 
 def poisson_disc(x1, y1, x2, y2, r, n):
@@ -76,8 +84,9 @@ def poisson_disc(x1, y1, x2, y2, r, n):
         ax, ay, aa, ai, ad, ag = record = choice(active)
         for i in range(n):
             # a = random.random() * 2 * pi
-            a = aa + (random.random() - 0.5) * max_angle(ai, ad)
+            # a = aa + (random.random() * 2 - 1) * max_angle(ai, ad)
             # a = random.gauss(aa, pi / 8)
+            a = new_angle(aa, ad)
             d = random.random() * r + r
             x = ax + cos(a) * d
             y = ay + sin(a) * d
@@ -92,8 +101,6 @@ def poisson_disc(x1, y1, x2, y2, r, n):
             pairs.append(pair)
             active.append((x, y, a, ai + 1, ad + d, ag))
             active.sort(key=lambda x: -x[4])
-            # if random.random() < 0.5:
-            #     active.remove(record)
             break
         else:
             active.remove(record)
@@ -118,11 +125,11 @@ def make_path(pairs):
     return path
 
 def main():
-    random.seed(1182)
-    points, pairs = poisson_disc(0, 0, 11, 8.5, 0.05, 24)
+    # random.seed(1182)
+    points, pairs = poisson_disc(0, 0, 11, 8.5, 0.035, 32)
     path = make_path(pairs)
     drawing = axi.Drawing([path]).scale_to_fit(11, 8.5)
-    # drawing.render().write_to_png('out.png')
+    drawing.render().write_to_png('out.png')
     axi.draw(drawing)
 
 if __name__ == '__main__':