Trading view script

I'm looking for someone to write an indicator for Trading view in pine script. What I want it to do is to highlight breakouts of closing prices above and below an EMA. Buy signals: A price bar closes above EMA where previous price bar was close below EMA. I want to have an arrow pointing up below breakout bar Sell signals: A price bar closes below EMA where previous price bar is closed above EMA. I want to have an arrow pointing down above breakout bar I want to have the option to: 1. change the EMA periods 2. Change the colour of the buy and sell signals Attached is a pic of chart showing what these look like on a chart