diff --git a/2021/sketch_2021_06_22a/sketch_2021_06_22a.gif b/2021/sketch_2021_06_22a/sketch_2021_06_22a.gif
new file mode 100644
index 00000000..d4338271
Binary files /dev/null and b/2021/sketch_2021_06_22a/sketch_2021_06_22a.gif differ
diff --git a/2021/sketch_2021_06_22a/sketch_2021_06_22a.pyde b/2021/sketch_2021_06_22a/sketch_2021_06_22a.pyde
new file mode 100644
index 00000000..16585c85
--- /dev/null
+++ b/2021/sketch_2021_06_22a/sketch_2021_06_22a.pyde
@@ -0,0 +1,33 @@
+from itertools import product
+from itertools import combinations
+
+add_library('peasycam')
+
+def setup():
+    global nodes, pairs
+    size(600, 600, P3D)
+    cam = PeasyCam(this, 1000)
+    row = range(-300, 301, 200)
+    nodes = list(product(row, repeat=3))    
+    pairs = [(a, b) for a, b
+             in combinations(nodes, 2)
+             if a[2] == b[2] 
+             and abs(a[0] - b[0]) <= 200
+             and abs(a[1] - b[1]) <= 200
+             ]
+def draw():
+    rotateX(HALF_PI)
+    background(200)
+    fill(200, 0, 0)
+    for x, y, z in nodes:
+        node(x, y, z)
+    for (xa, ya, za), (xb, yb, zb) in pairs:
+        line(xa, ya, za, xb, yb, zb)
+        
+def node(x, y, z):
+    pushMatrix()
+    translate(x, y, z),
+    box(10)
+    popMatrix()
+    
+    
diff --git a/README.md b/README.md
index a6d1d371..b185d596 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,12 @@ Here are listed some of the tools I have been using:
 
 ---
 
+![sketch_2021_06_22a](2021/sketch_2021_06_22a/sketch_2021_06_22a.gif)
+
+[sketch_2021_06_22a](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_06_22a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
 ![sketch_2021_06_21c_noise_terrain](2021/sketch_2021_06_21c_noise_terrain/sketch_2021_06_21c_noise_terrain.gif)
 
 [sketch_2021_06_21c_noise_terrain](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_06_21c_noise_terrain) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]