Click on the different parts to set them. For example, setting the 1st part to 240 bpm with 2 measures, and then setting the 2nd part to 20 bpm with 2 measures would sound like: "clapclapclapclap,clapclapclapclap", "clap clap clap clap, clap clap clap clap." (Then there would be nonsense "clapafkasjfai" from parts 3 and 4 which have no input.) Presets for already set ones. (Mostly my pieces.) Don't forget to set the time signature! (Only the top for now) Start to start, stop to stop, blah, blah, basics.
If you want to make a preset: Parts for all 4 bpms // Preset name // How many measures each part should last // the numerator for the time signature // IF some part should repeat, which part will repeat, and when (between which part)? I know there are other bottoms than, 4 but I was too lazy. Tell me in the comments on what preset (and the info) I should add! (I'm sorry there are no fermatas ( ̄▽ ̄*)ゞ)