With Loops for Android application you can compose your patterns using the grid of 16 buttons, or steps, each step being 1/16th of a measure, and choosing between different sound "channels", each one with an unique set of samples. This application divided in two sections like the song composer and the loop composer. In song composer you have the list of all the loops available for your song. The loop composer compose your loops, the main building modules for your songs. The length of the loop is specified in the options dialog in the song composer.