diff --git a/2021/sketch_2021_01_25b/sketch_2021_01_25b.png b/2021/sketch_2021_01_25b/sketch_2021_01_25b.png
new file mode 100644
index 00000000..b43562c7
Binary files /dev/null and b/2021/sketch_2021_01_25b/sketch_2021_01_25b.png differ
diff --git a/2021/sketch_2021_01_25b/sketch_2021_01_25b.pyde b/2021/sketch_2021_01_25b/sketch_2021_01_25b.pyde
new file mode 100644
index 00000000..2af98796
--- /dev/null
+++ b/2021/sketch_2021_01_25b/sketch_2021_01_25b.pyde
@@ -0,0 +1,38 @@
+from itertools import product, permutations
+
+BORDER = 100
+SIZE = 60
+
+def setup():
+    global grid
+    size(680, 680)
+    grid = list(product(range(BORDER, width - BORDER + 1, SIZE),
+                        range(BORDER, height - BORDER + 1, SIZE)))    
+    colors = (hex_color('#264653'),
+              hex_color('#2a9d8f'), 
+              hex_color('#9c46a'), 
+              hex_color('#f4a261'),
+              hex_color('#e76f51'))
+    
+
+    
+    perms = list(permutations(colors, 3))
+    print(len(perms))
+    
+    for i, (x, y) in enumerate(grid):
+        if i < len(perms):
+            for j, c in enumerate(perms[i]):
+                fill(c)
+                circle(x, y, SIZE - j * 10)
+        
+def hex_color(s):
+    """
+    This function allows you to create color from a string with hex notation in Python mode.
+    
+    On "standard" Processing (Java) we can use hexadecimal color notation #AABBCC
+    On Python mode one can use this notation between quotes, as a string in fill(),
+    stroke() and background(), but, unfortunately, not with color().
+    """
+    if s.startswith('#'):
+        s = s[1:]
+    return color(int(s[:2], 16), int(s[2:4], 16), int(s[4:6], 16))
diff --git a/README.md b/README.md
index 45e0c7ee..26b1a7fa 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,12 @@ Here are listed some of the tools I have been using:
 
 ---
 
+![sketch_2021_01_25b](2021/sketch_2021_01_25b/sketch_2021_01_25b.png)
+
+[sketch_2021_01_25b](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_25b) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
 ![sketch_2021_01_24c](2021/sketch_2021_01_24c/sketch_2021_01_24c.png)
 
 [sketch_2021_01_24c](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_24c) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]