seirpinski carpet

Author: furas

tkinter/timer-using-after/pomodoro.py

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+import tkinter as tk
+
+class Timer:
+    
+    def __init__(self, master):
+        self.master = master
+
+        master.title("Pomodoro Timer")
+
+        self.state = False
+        self.pause = False
+        
+        self.mins = 25
+        self.secs = 0
+            
+        self.display = tk.Label(master, text="00 : 00")
+        self.display.grid(row=0, column=0, columnspan=2, ipady=10)
+
+        button = tk.Button(master, text="Start", bg="Green", fg="White", activebackground="Light Green", command=self.start)
+        button.grid(row=1, column=0, ipady=10)
+
+        button = tk.Button(master, text="Pause", bg="Dark Red", fg="White", activebackground="Red", command=self.pause)
+        button.grid(row=1, column=1, ipady=10)
+
+    def countdown(self):
+        if self.state == True:
+            
+            if (self.mins == 0) and (self.secs == 0):
+                self.display.config(text="Done!")
+                self.state = False
+            else:
+                self.display.config(text="%02d : %02d" % (self.mins, self.secs))
+
+                if self.secs == 0:
+                    self.mins -= 1
+                    self.secs = 59
+                else:
+                    self.secs -= 1
+                    
+                self.master.after(1000, self.countdown)
+
+    def start(self):
+        if self.state == False:
+            self.state = True
+            self.mins = 25
+            self.secs = 0
+            self.countdown()
+
+    def pause(self):
+        if self.state == True:
+            self.state = False
+
+root = tk.Tk()
+Timer(root)
+root.mainloop()

turtle/sierpinski-carpet/README.md

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+# Sierpinski carpet
+
+![#1](images/result-animation.gif?raw=true)   
+
+Wikipedia: [Sierpinski carpet](https://en.wikipedia.org/wiki/Sierpinski_carpet)

turtle/sierpinski-carpet/images/result-animation.gif

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+#!/usr/bin/env python3
+
+import turtle
+
+# --- functions ---
+
+def s(n, l):
+
+    if n == 0: # stop conditions
+
+        # draw filled rectangle
+
+        turtle.color('black')
+        turtle.begin_fill()
+        for _ in range (4):
+            turtle.forward(l)
+            turtle.left(90)
+        turtle.end_fill()
+
+    else: # recursion
+
+        # around center point create 8 smalles rectangles.
+        # create two rectangles on every side 
+        # so you have to repeat it four times
+
+        for _ in range(4):
+            # first rectangle
+            s(n-1, l/3)    
+            turtle.forward(l/3)
+
+            # second rectangle
+            s(n-1, l/3)    
+            turtle.forward(l/3)
+
+            # go to next corner
+            turtle.forward(l/3)
+            turtle.left(90)
+            
+        # update screen
+        turtle.update()
+
+# --- main ---    
+
+# stop updating screen (to make it faster)
+turtle.tracer(0) 
+
+# start on screen click so it can be recorded with external program
+#turtle.onscreenclick(lambda x,y:s(4, 400), 1)
+
+# start
+s(4, 400)
+
+# event loop
+turtle.mainloop()