Need to Develop an EA for the Default Heiken Ashi Candles

I have an EA that trades Heiken Ashi candles effectively (I have a purchased copy not the source code). I am interested in the default Heiken Ashi NOT the smoothed. However,one thing I wanted to modify in its logic is to open and close trades based on the color change of the Heiken Ashi candles (i.e. open a sell order as the candle is still active and starting to turn red and close it if the candle closes as blue OR the next candle closes as blue AND the opposite is true for a buy trade). Please note that a bullish candle is blue and a bearish candle is red. Of course, the trade should continue as long as the color of the next candle is the same as the current trade (blue for a buy trade and ed for a sell trade).