python: add random timer experiment

python/README.md

@@ -180,3 +180,8 @@ After the user presses the `pin_logo` button:
 - `button_a` cancels/resets timero
 
 After both the work and break timers complete, it returns to the first state.
+
+### [Random Timer](./src/random-timer.py)
+
+I wanted to implement a timer that used an hourglass animation.
+The seconds/duration of the timer is set using an RNG.

python/src/random-timer.py

@@ -0,0 +1,34 @@
+# Imports go at the top
+import random
+
+from microbit import *
+
+
+class MyImages:
+    hourglass_start: Image = Image("99999:" "09990:" "00900:" "09090:" "90009:")
+
+    hourglass_end: Image = Image("90009:" "09090:" "00900:" "09990:" "99999:")
+
+    hourglass_progress_0: Image = Image("99999:" "09990:" "00900:" "09690:" "90009:")
+
+    hourglass_progress_1: Image = Image("99999:" "09990:" "00900:" "09090:" "90609:")
+
+
+myimages = MyImages()
+
+print("INFO: Random Hourglass Timer")
+
+# Code in a 'while True:' loop repeats forever
+while True:
+    seconds: int = random.randint(10, 90)
+    display.show(myimages.hourglass_start)
+    sleep(1000)
+
+    print("INFO: starting " + str(seconds) + " second timer")
+    for i in range(0, seconds):
+        display.show(getattr(myimages, "hourglass_progress_" + str(i % 2)))
+        sleep(1000)
+
+    print("INFO: timer has completed")
+    display.show(myimages.hourglass_end)
+    sleep(1000)