ok so sample loops are great to get song structure down. songs typically but not exclusively broken down into 16 bar pieces (when in 4/4 time). those pieces can be divide into even more parts and you'll hear patterns like A,B,A,B or A,B,A,C or A,A,A,B each letter representing a measure of melody or rhythm.
once you got that down you can move onto using one shot samples for percussion and tweaking your own synths to perfection. this gives you complete control of the sound you want to make. Biggest suggestion would be to find songs that sound professional to you on audiotool and click remix.
check out their synth set ups and timeline automations. and watch a lot of Youtube tutorials. learn how create synth setups for the Heisenburg of pulvisat with more common software/plugins like Sylenth. the knowledge you learn there can be transfered to audiotool. Keep on practicing. keep clicking on remix. (And don't be afraid to click on some of the big boys out there; pray for elias, xavrock, aBstRact, etc.) experiment, learn, create.