I guess a black widow
A garden orb weaver probably
If the main part of it is brown or tan, then it is a male black widow, or a juvinile female.
a redback spider
From what I have been told, this sounds like an Orb Spider...which is in the Widow Family and is extremely venomous.
White tailed spider very dangerous and toxic
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a dot 2 dot spider
black and white jumping spider
It is called a jumping spider----
A Jumping Spider