foo.st

import "stdlib"
import "unistd"

delay = 1

x = 10
blocks = [
    `x += 1`,
    `x -= 1`,
    `x *= 2`,
    `x /= 2`,
    `x *= x`
]
pickFun = `blocks[Arc4random_uniform(blocks count-1)]`

funs = []
10 times: {
    funs push: (async pickFun())
}
funs each: { fun |
    fun waitTillFulfilled call
    x print
    Sleep(1)
}