These eight bars are pretty simple. There are two 4-bar phrases, which both contain considerably different material although they both end in perfect authentic cadences. Therefore, the structure that contains these phrases would be a contrasting period. As for the structural phenomena, there's not a whole lot going on. The biggest change is the unmarked switch in tonality in measure six. Here, the piece tonicizes the dominant and remains in this key for some time after the end of the initial period. All of the other phenomena remain pretty nonexistant.