EA That Trades On EMA Crossover

I want a simple EA that places instant market execution whenever two EMAs (that I can set) cross over. Settings should include the following: 1. Two EMA parameters that I can set; 2. Adjustable Stop loss; 3. Lot size. 4. Trailing stop;

EXAMPLE: When the 14 EMA crosses below the 50, a sell trade is executed. This continues until the 14 crosses above the 50, at which time the previous sell trade is closed and a new buy trade is executed.

IMPORTANT: the EA must work on multiple time frames simultaneously on the same currency pair. For example it must run with different settings on EURUSD M1, M5, and M15.

Also, this EA has to work on my Forex.com demo account. Thanks!