How to visually represent 2 kinds of events (one time and repeating)?

There are 2 kinds of events:

  1. the single event, which once you finish it, it disappears (e.g. a workshop)

  2. the repeating event, that stays alive after you finish it (e.g. work or classes)

I'm representing these events with a rectangle like this:

        |  Name
  Date  |                        [IMAGE]
        |  Description

I want to insert an image into the [IMAGE] rectangle, that tells if the event is single or repeating, but I don't know a good pair of images to represent them (although I thought repeating could be something like ↻).

Would it be better if I let the single event without image and use that for repeating or there is a good pair of images that I can use?

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