diff --git a/s319/s319.pyde b/s319/s319.pyde
new file mode 100644
index 00000000..fae42a58
--- /dev/null
+++ b/s319/s319.pyde
@@ -0,0 +1,17 @@
+
+
+
+def setup():
+    size(500, 500)
+    noFill()
+    strokeWeight(10)
+    stroke(100)
+    x_mark(300, 200, 30)    
+    x_mark(200, 200, 30)
+    ellipse(250, 250, 200, 200)
+    
+def x_mark(x, y, s):
+    with pushMatrix():
+        translate(x, y)
+        line(-s, -s, s, s)
+        line(s, -s, -s, s)
\ No newline at end of file
diff --git a/s320/node.py b/s320/node.py
new file mode 100644
index 00000000..07ee9ff6
--- /dev/null
+++ b/s320/node.py
@@ -0,0 +1,45 @@
+from random import choice
+
+class Node():
+    nodes = []
+ 
+    def __init__(self, x, y):
+        self.x = Node.border + Node.spacing / 2 + x * Node.spacing - width / 2
+        self.y = Node.border + Node.spacing / 2 + y * Node.spacing - height / 2
+        self.size_ = 1
+        self.rot0 = choice((0, HALF_PI)) #, PI, PI + HALF_PI))
+        self.rot1 = choice((HALF_PI , PI)) #, PI + HALF_PI))
+        
+    def plot(self, ang):
+        """ draws node """
+        with pushMatrix():
+            translate(self.x, self.y)
+            d = abs(self.rot0 + ang - self.rot1)
+            if d >= 0.30:
+                rotate(self.rot0 + ang)
+            else:
+                self.rot0 = self.rot1 - ang
+                rotate(self.rot1)
+                   
+            noFill() #stroke(0)
+            stroke(0, 0, 200, 50)
+            siz = Node.spacing * self.size_
+            rect(0, 0, siz, siz)
+            # line(-siz/2, -siz/2, siz/2, siz/2)
+            stroke(0, 100, 100)
+            for i in range(-28, 29, 7):
+                arc(-siz/2, -siz/2, siz+i, siz+i, 0, HALF_PI)
+                arc(siz/2, siz/2, siz+i, siz+i, PI, PI+HALF_PI)
+
+    @classmethod                                            
+    def init_grid(cls, grid_size, border):
+        cls.border = border
+        cls.spacing = (width - cls.border * 2) / grid_size
+        cls.nodes = []
+        for x in range(grid_size):
+            for y in range(grid_size):
+                    new_node = cls(x, y)
+                    cls.nodes.append(new_node)
+
+    
+            
\ No newline at end of file
diff --git a/s320/s286.gif b/s320/s286.gif
new file mode 100644
index 00000000..cc41aef5
Binary files /dev/null and b/s320/s286.gif differ
diff --git a/s320/s320.png b/s320/s320.png
new file mode 100644
index 00000000..d781e72d
Binary files /dev/null and b/s320/s320.png differ
diff --git a/s320/s320.pyde b/s320/s320.pyde
new file mode 100644
index 00000000..27969052
--- /dev/null
+++ b/s320/s320.pyde
@@ -0,0 +1,58 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME = "s320" # 20181114
+OUTPUT = ".gif"
+
+GRID_SIZE = 10
+BORDER = 50
+
+from random import seed
+from random import choice
+from node import Node
+
+def setup():
+    size(500, 500)
+    strokeWeight(2)
+    rectMode(CENTER)
+    frameRate(10)
+    random_seed(101)
+    Node.init_grid(GRID_SIZE, BORDER)
+            
+def draw():
+    translate(width/2, height/2)
+    background(200)
+    ang = 0 #frameCount/31.
+        
+    for node in Node.nodes:
+        node.plot(ang)
+
+    if ang < TWO_PI:
+        pass
+        #saveFrame("###.png")
+    else:
+        noLoop()                                            
+ 
+def keyPressed():
+    if key == "n":
+        Node.init_grid(GRID_SIZE, BORDER)
+    if key == "s": saveFrame("###.png")
+    
+    
+def random_seed(s=None):
+    global rnd_seed
+    if s:
+        rnd_seed = s
+        seed(rnd_seed)
+        randomSeed(rnd_seed)    
+    else:
+        seed(rnd_seed)
+        randomSeed(rnd_seed)
+    
+# print text to add to the project's README.md             
+def settings():
+    println(
+"""
+![{0}]({0}/{0}{2})
+
+{1}: [code](https://github.com/villares/sketch-a-day/tree/master/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+""".format(SKETCH_NAME, SKETCH_NAME[1:], OUTPUT)
+    )
\ No newline at end of file