// 33.ck : sine // sine tones (fail-correct)SinOsc s => dac; [ 0, 2, 4, 7, 9 ] @=> int f[]; // time loopwhile( true ){    // choose freq    Std.mtof( f[Math.random2( 0, 4 )] + 72 ) => s.freq;    // advance time    100::ms => now;}