The concept of a pattern in renoise is that one is played at a time in a sequence. The tracks (that form the patterns) are played simultaneously, but still you have to copy/paste those you need to loop through patterns.
The method you have in mind is under discussion in Arranger thread to be implemented in the future though.
I may suggest to have a good browsing of renoise tutorials before posting your questions in the forums. You may find the answer to 95% of your questions there.