Pinescript Strategy Contract Size Adjustment

I'm using TradingView and I need a modification to my pinescript strategy. Currently, it takes the same contract size for each trade. However, I'd like it to downsize the contract size by 50% after 2 consecutive losses until a winning trade happens , then it resets to original contract size - and increase the contract size by 50% after 2 consecutive wins until a losing trade happens, then it resets to original contract size.

Key requirements:
- Adjust contract size based on win/loss streaks
- Reset contract size after a winning/losing streak
- Experience in TradingView and Pinescript is a must