For Contrast, I tried to use my Keys sample in as many ways as possible at different points. The pitch is constantly changing in each successive note. I used an arpeggiator at one point to create a sense of urgency, as if someone's keys are constantly clanging against each other as he/she is running away from something. Besides that, I tried to give my recording a sense of space by using both channels differently. Lastly, in the second section of the recording, the entire 'melody' tends to follow the percussion's pattern.