I need a simple EA with bolliner bands

I need an EA in MQL5 for MetaTrader 5 with the ability to select the timeframe, which should be 5 minutes, 15 minutes, or 1 hour. It should be based on Bollinger Bands with a period of 50 and a multiplier of 2. When two consecutive candles touch, intersect, or surpass the upper band, a long position should be opened, which will close when the price touches the middle band (the central moving average). Conversely, when two consecutive candles touch, intersect, or surpass the lower band, a short position should be opened, which will only close when the price touches the middle band. And this should work cyclically. let me know if you can do it. Thank you