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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def Point(pos=(0, 0, 0), r=12, c="red", alpha=1):
 """Create a simple point actor."""

    if len(pos) == 2:
        pos = (pos[0], pos[1], 0)
    actor = Points([pos], r, c, alpha)
    return actor