Customize Shopify website

Hi, I want to customize my shopify website to have a feature where buy a buyer can edit the variant of the quantities of a single product. e.g I want to buy a shirt, I selected the shirt and increased the quantity to 5, I wouldn't want all 5 shirts to be in black color. I will want to change the color and size of these shirt to fit my need{ the same shirts but I want different color and size options for the buyer} If you can do this ill be happy Hi, I want to customize my shopify store to have a feature where buy once a buyer wants to purchase a products and he increases the item quantity to 5, he will be able to change the variant of each quantity Like T shirt [7] 1 ---{size=M} {color=green} 2---{size=S} {color=blue} 3---{size=L} {color=pink} 4---{size=Xl} {color=red} 5---{size=S} {color=brown} 6---{size=XL} {color=Yellow} 7---{size=Ml} {color=red} So if I want more than one item for a single product, I can change the color and size for all the item quantity under the same T- shirt instead of having one color and size for all seven products. HERE IS A SAMPLE OF WHAT I WANT. [login to view URL]