This is a Dixdeux. Two lines of 10 syllables each, followed by a 2 syllable line. If more than one stanza is written then the third line becomes a refrain in the following stanzas.
Warm sand runs through his fingers as he builds, a sand castle filled with elusive dreams. Waves splash. Incoming tide erodes the foundation - the castle falls and crumbles at his feet. Waves splash. Time and tide wash his castle out to sea. Sighing, he takes a breath and starts over. Waves splash.
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