5 => int n;
250::ms => dur d;

DelayA delay_line[n];
adc => delay_line[0];
for (int i; i<n; i++) {
    delay_line[i] => dac;
    if (i<(n-2)) {
        delay_line[i] => delay_line[i+1];
    }
    d => delay_line[i].max;
    d => delay_line[i].delay;
}

while (true) {
    second => now;
}