Added timer script

rpi/lcd-screen/main.py

@@ -0,0 +1,38 @@
+#import lcd
+import time
+
+whiteTime = 5 * 60
+blackTime = 5 * 60
+current = "white"
+
+def compute_seconds(total_seconds):
+    return total_seconds % 60
+
+def compute_minutes(total_seconds):
+    return total_seconds // 60
+
+def update_timer(whiteSeconds, blackSeconds):
+    white_minutes = compute_minutes(whiteSeconds)
+    white_seconds = compute_seconds(whiteSeconds)
+
+    black_minutes = compute_minutes(blackSeconds)
+    black_seconds = compute_seconds(blackSeconds)
+
+    print(f"W {white_minutes:02d}:{white_seconds:02d} || B {black_minutes:02d}:{black_seconds:02d}")
+    #lcd.setText(f"W {white_minutes:02d}:{white_seconds:02d} || B {black_minutes:02d}:{black_seconds:02d}")
+
+if __name__ == "__main__":
+
+    while whiteTime > 0 and blackTime > 0:
+        currentTime = 0
+        if current == "white":
+            current = "black"
+            whiteTime -= 1
+        else:
+            current = "white"
+            blackTime -= 1
+
+        update_timer(whiteTime, blackTime)
+        time.sleep(1)
+
+    #lcd.setText("Time up!")