Create a script for buying and selling a stock like EURUSD

Me and my friend have created a system which does all the magic, but i need a simple buy and sell script which will be activated by our system.

Nothing fancy, just a simple script which i can for easy specific stock, in this example EURUSD and when i run this script it should buy that stock.

When our system says it should be sold, we need to activate a script which then sells the EURUSD stock which has previous been bought.

There will never be a stock which will be bought more then once.

In short, can you create a simple script for me to buy a stock and sell a stock of EURUSD?

Kind regards,

Remco