# Trees are made of Serial, Parallel, and Exec nodes, nested arbitrarily.
import conducto as do

def simple() -> do.Serial:
    output = do.Serial()
    output["First"] = do.Parallel()
    output["First/RunsInParallel1"] = do.Exec("echo 'I run first'")
    output["First/RunsInParallel2"] = do.Exec("echo 'I also run first'")
    output["Next"] = do.Exec("echo 'I run last.'")
    return output