Running a sequence container on each file in foreach loop

Just trying to figure out the foreach loop and all.  Is it possible to run a sequence container against each file in a for each loop? i can run the loop with a script task inside and get the file names.  However when i attach a precedence constraint to the connection from the script task(this sets some variables i need later) it wont process through the files.  The first one works sometimes but the second never works.  Basically i need a way to run tasks against each file.  Any help would be appreciated