This explains how to

MIDIoutPattern.scd

/*
How to send midi to other software such as live !

make sure the IAC bus is turned on
check out this if you don't know how
https://help.ableton.com/hc/en-us/articles/209774225-Using-virtual-MIDI-buses-in-Live
*/

//initialize the midi client
MIDIClient.init;

//open the port
m = MIDIOut(0);

(
Pbindef(\miditest,
  \type, \midi,
  \midiout, m,
  \chan, Prand([0, 1, 2], inf), //sends to multiple instruments in DAW
  \amp, 0.4, //midi velocity
  \degree, Pseq([Pseq([0], 3), 1, Pseq([0], 5), 1, Pseq([0], 7), 1], inf),
  \dur, Pexprand(0.2, 2),
  \octave, 4,
).play;
)

Pdef(\miditest).stop;

/*
check http://doc.sccode.org/Tutorials/A-Practical-Guide/PG_08_Event_Types_and_Parameters.html#MIDI%20output
for more commands

Happy sequencing!
*/