example.nim

import threadpool, math, os

randomize()

proc setRand(k: int, vals: var seq[int]) =
    vals[k] = k * 2
    if k < 7:
        sleep(random(1000))
        vals[k+1] = k * 2 

proc doParallel() =
    var vals = newSeq[int](8)
    parallel:
        for k in 0..vals.high:
            spawn setRand(k, vals)
    echo($vals)

doParallel()