[TYPO3-commerce] global discount for articles wanted

[Wild Wild Web - Internetservices]

Hello,
new to this list I'd like to ask for help or a solution for the 
following task:

I have different pages with a products list.
Each product has two articles - let's say attribute color red and color 
blue.
Each article has it's own price.

Entering a certain page with a product list I would like to give a 
discount for all customers
of 10% for all articles with attribute color red and 20% for all 
articles with attribute color blue.
In the product list both the original price and the discount price 
should be displayed for each article.

Smartest would be if I could define the discount amount by typoscript in 
an extension template like:
discountArticlesAttribute1 = 10%
discountArticlesAttribute2 = 20%

Another possibility would be to define the discount amounts and 
correlating lists of article IDs like:
discount1 = 10%
discount1.articleList = 3,5,7,9
discount2 = 20%
discount2.articleList = 2,4,6,8

A third possibility would be to create a second - 10% discount - and 
third price - 20% discount - for all articles and manage the prices used 
for a certain by typoscript in an extension template like:
price2.articleList = 3,5,7,9
price3.articleList = 2,4,6,8

BUT, I've no clue how to do it... and appreciate all help - paid help 
too if neccessary.
Thanks.

Heiko