Add Pomodoro Timer CLI tool in Python (76 lines)

A terminal-based Pomodoro Timer with live countdown, progress bar,
and automatic cycling between work sessions and breaks. Uses only
Python standard library.

Merged from PR #555

Co-authored-by: Kishore Gowthaman <kishore2k05@users.noreply.github.com>

Author: fridayjoshi

pomodoro-Timer/README.md

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+# 🍅 Pomodoro Timer
+
+A terminal-based Pomodoro Timer that helps you stay focused using the [Pomodoro Technique](https://en.wikipedia.org/wiki/Pomodoro_Technique).
+
+## 📸 Preview
+
+```
+╔══════════════════════════════════════╗
+║        🍅  POMODORO TIMER  🍅         ║
+╚══════════════════════════════════════╝
+
+  Phase  : 🔴  FOCUS — Work Session
+  Cycle  : 1 / 4
+
+  Time   : 24:13
+
+  [████████████░░░░░░░░░░░░░░░░░░] 40%
+
+  Press Ctrl+C to quit.
+```
+
+## ⏱️ How It Works
+
+The Pomodoro Technique breaks work into focused intervals:
+
+| Phase        | Duration  |
+|--------------|-----------|
+| Work session | 25 minutes |
+| Short break  | 5 minutes  |
+| Long break   | 15 minutes (after every 4 cycles) |
+
+## 🚀 Installation
+
+No external libraries required — uses only Python's standard library.
+
+```bash
+git clone https://github.com/YOUR_USERNAME/100LinesOfCode.git
+cd 100LinesOfCode/Pomodoro-Timer
+```
+
+## ▶️ Usage
+
+```bash
+python pomodoro.py
+```
+
+- Press **Enter** to start/continue each phase
+- Press **Ctrl+C** at any time to quit
+
+## ⚙️ Customization
+
+Edit the config at the top of `pomodoro.py`:
+
+```python
+WORK_MINS            = 25   # Work session length
+SHORT_BREAK          = 5    # Short break length
+LONG_BREAK           = 15   # Long break length
+CYCLES_BEFORE_LONG   = 4    # Cycles before a long break
+```
+
+## 🛠️ Technologies
+
+- Python 3.x
+- Standard library only (`time`, `sys`, `os`)
+
+## 📏 Lines of Code
+
+**81 lines** (excluding comments and blank lines)

pomodoro-Timer/pomodoro.py

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+import time
+import sys
+import os
+
+WORK_MINS   = 25
+SHORT_BREAK = 5
+LONG_BREAK  = 15
+CYCLES_BEFORE_LONG = 4
+
+def beep(times=3):
+    for _ in range(times):
+        print("\a", end="", flush=True)
+        time.sleep(0.3)
+
+def clear():
+    os.system("cls" if os.name == "nt" else "clear")
+
+def format_time(seconds):
+    m, s = divmod(seconds, 60)
+    return f"{m:02d}:{s:02d}"
+
+def countdown(label, duration_mins, cycle_info=""):
+    total = duration_mins * 60
+    bar_width = 30
+
+    for remaining in range(total, -1, -1):
+        elapsed = total - remaining
+        filled  = int(bar_width * elapsed / total)
+        bar     = "█" * filled + "░" * (bar_width - filled)
+        pct     = int(100 * elapsed / total)
+
+        clear()
+        print("╔══════════════════════════════════════╗")
+        print("║        🍅  POMODORO TIMER  🍅         ║")
+        print("╚══════════════════════════════════════╝")
+        print(f"\n  Phase  : {label}")
+        if cycle_info:
+            print(f"  Cycle  : {cycle_info}")
+        print(f"\n  Time   : {format_time(remaining)}")
+        print(f"\n  [{bar}] {pct}%\n")
+        print("  Press Ctrl+C to quit.\n")
+
+        if remaining > 0:
+            time.sleep(1)
+
+    beep(3)
+
+def run():
+    cycle = 0
+    print("\n  Welcome to Pomodoro Timer!")
+    print(f"  Work: {WORK_MINS}m  |  Short break: {SHORT_BREAK}m  |  Long break: {LONG_BREAK}m\n")
+    input("  Press Enter to start your first session...")
+
+    while True:
+        cycle += 1
+        info = f"{cycle} / {CYCLES_BEFORE_LONG}"
+        countdown("🔴  FOCUS — Work Session", WORK_MINS, info)
+        print("\n  ✅  Work session complete!\n")
+
+        
+        if cycle % CYCLES_BEFORE_LONG == 0:
+            print(f"  🎉  {CYCLES_BEFORE_LONG} cycles done! Time for a long break.\n")
+            input("  Press Enter to start your long break...")
+            countdown("🟢  LONG BREAK", LONG_BREAK)
+        else:
+            input("  Press Enter to start your short break...")
+            countdown("🟡  SHORT BREAK", SHORT_BREAK)
+
+        print("\n  Break over! Ready for the next session?\n")
+        input("  Press Enter to continue...\n")
+
+if __name__ == "__main__":
+    try:
+        run()
+    except KeyboardInterrupt:
+        print("\n\n  👋  Session ended. Great work!\n")
+        sys.exit(0)