Beginning and end counter for promotion

Beginning and end counter for promotion

I need to put the date of beginning of end of promotion in my shop opencart and it appears the counter of days and minutes to end the promotion, so the promotion end automatically the product out of stock.

Remember the days counter have to appear on the site available for the client, this time will be the time that customers have to buy each product demo site https://www.superdesc.com.br/

I want the counter to be counting to finish
Equal to this product

http://althemist.com/metropoliten/index.php?route=product/product&product_id=42

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Requirements

I need to put the date of beginning of end of promotion in my shop opencart and it appears the counter of days and minutes to end the promotion, so the promotion end automatically the product out of stock.

Remember the days counter have to appear on the site available for the client, this time will be the time that customers have to buy each product demo site https://www.superdesc.com.br/

I want the counter to be counting to finish
Equal to this product
http://althemist.com/metropoliten/index.php?route=product/product&product_id=42

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Skills Required

Java Programming Html Opencart Php