Shortcode atts array()

Dear, i try to create a shortcode, and i don’t find how to get an array this way :

[shortcode id=1,2,3,4,5]

to return something like this (with a foreach??):

<img src=”$1″/> <img src=”$2″/> <img src=”$3″/> etc etc

Thank you very much if you can help me !