diff --git a/generators/unrath.py b/generators/unrath.py
new file mode 100755
index 0000000..9f38dfb
--- /dev/null
+++ b/generators/unrath.py
@@ -0,0 +1,113 @@
+#!/usr/bin/env python3
+
+import sys
+import random
+import argparse
+import blup.frame
+import blup.output
+import blup.animation
+import blup.writebml
+import colorsys
+
+
+WIDTH = 22
+HEIGHT = 16
+DEPTH = 256
+
+
+def convert_color(c):
+    return list(map(lambda x: int(round(x*(DEPTH-1))), c))
+
+
+def get_random_color():
+    if random.random() < 0.5:
+        s = 1
+        v = random.random()
+    else:
+        s = random.random()
+        v = 1
+    return colorsys.hsv_to_rgb(random.random(), s, v)
+
+
+def cap(x):
+    return min(1, max(0, x))
+
+
+def cyc(x):
+    while x < 0:
+        x += 1
+    while x > 1:
+        x -= 1
+    return x
+
+
+class Unrath:
+    def __init__(self):
+        self.shape = set([(0, 0)])
+        shapesize = random.randint(2, 5)
+        while len(self.shape) < shapesize:
+            p = random.sample(self.shape, 1)[0]
+            self.shape.add((p[0]+random.randint(0, 1), p[1]+random.randint(0, 1)))
+        self.shapewidth = max(map(lambda p: p[0], self.shape))
+        shapeheight = max(map(lambda p: p[1], self.shape))
+
+        y = random.randint(0, HEIGHT-shapeheight)
+        if random.random() > 0.5:
+            d = 1
+            x = -self.shapewidth
+        else:
+            d = -1
+            x = WIDTH + self.shapewidth
+        self.pos = (x, y)
+        self.finished = False
+        self.speed = d * random.randint(2, WIDTH/2)
+        self.color = get_random_color()
+
+    def update(self, dt):
+        if (self.pos[0] + self.shapewidth < 0 and self.speed < 0) or \
+           (self.pos[0] > WIDTH and self.speed > 0):
+           self.finished = True
+        else:
+            self.pos = (self.pos[0] + dt*self.speed, self.pos[1])
+
+    def draw(self, frame):
+        for p in self.shape:
+            try:
+                frame.setPixel(
+                    int(self.pos[0] + p[0]),
+                    int(self.pos[1] + p[1]),
+                    convert_color(self.color)
+                )
+            except ValueError:
+                pass
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Generate Unrath animations')
+    parser.add_argument('-d', '--delay', type=int, default=50)
+    parser.add_argument('-t', '--time', type=int, default=15)
+    parser.add_argument('-n', '--num-unraethe', type=int, default=5)
+    parser.add_argument('output_file')
+    args = parser.parse_args()
+
+    dim = blup.frame.FrameDimension(WIDTH, HEIGHT, DEPTH, 3)
+    anim = blup.animation.Animation(dim)
+    anim.tags['description'] = ' '.join(sys.argv)
+
+    t = 0
+    unraethe = []
+    while t < args.time:
+        t += args.delay / 1000
+        frame = blup.animation.AnimationFrame(dim, args.delay)
+
+        unraethe = list(filter(lambda u: not u.finished, unraethe))
+        if len(unraethe) < args.num_unraethe:
+            unraethe.append(Unrath())
+
+        for u in unraethe:
+            u.update(args.delay / 1000)
+            u.draw(frame)
+
+        anim.addFrame(frame)
+
+    blup.writebml.writeBml(anim, args.output_file)