Simple Sequences

You can create a sequence from an outline.  Type something like this:

At Home.Wash Car
    Garage.retrieve bucket
    Kitchen.prepare bucket
        Kitchen.pour soap in bucket
        Kitchen.fill bucket
    Garage.get sponge
    Garage.open door
    Driveway.apply soapy water
    Driveway.empty bucket
    Garage.close door
    Garage.replace bucket

Then do this:

    genericseq.pl UML::Sequence::SimpleSeq inputfile | seq2svg.pl > output.svg

WWW: https://metacpan.org/release/UML-Sequence