sorry im a bit confused but what do you mean my song? and patterns? *blows up and dies from confusion*
Look at the top-middle of the interface with the play and stop buttons. You should see that "Pat" is lit up (stands for pattern). Underneath it says "song". Choose that. This will let you organize multiple patterns into a song. Use the number pad looking buttons to the right of that to create and edit different patterns. Use the playlist window to paint out the order that each pattern will play. ^_^