Need help in converting this Regular Expression to Epsilon NFA

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good day, can someone help me in converting this regular expression?

$(1*00^+)*$

I know how to convert a regular expression to Epsilon Finite Automata but that + sign besides the second 0 throws me off lol, if someone can explain what that + sign does, it would be great. I can't search anything about it in google because I don't even know what it is called. Thanksss