TradingView Piercing Pattern Indicator

I need a Pine Script indicator that reliably spots three specific candlestick situations on TradingView charts:
• Bullish Piercing Pattern
• Bearish Piercing Pattern (Dark Cloud Cover)
• Neutral / indecisive candles (doji-type or very small bodies)

The script must mark each event visually on the chart and trigger the full set of TradingView alerts—email, popup, and sound—whenever a signal appears. I will run it primarily on Daily and Weekly timeframes, so the logic and alert conditions should be optimised and tested for those intervals; if the code remains timeframe-agnostic under the hood, all the better.

Once the script is complete I also want a short walk-through (video call or recorded demo) that explains:
1. How the detection rules were coded
2. How to customise colours, labels, and alert text
3. How to import, attach, and manage the indicator inside my own TradingView account

Deliverables
1. Clean, well-commented Pine Script v5 indicator file
2. Alert syntax pre-configured for email, popup, and sound
3. Quick-start guide or README covering installation and settings
4. One training session (or a concise screen-recording) fulfilling the three points above

I will test by applying the indicator to several major stock and crypto tickers on both Daily and Weekly charts; every occurrence of the three patterns should be flagged and the corresponding alerts must fire without errors.