It sounds like you could be describing the Daring Jumping Spider.
WHAT KIND OF SPIDER IS A WHITE SPIDER WITH A BRIGHT ORANGE PATTERN ON ITS BACK
a little spider black legs and yellow back with black spots
Could be the Black and yellow garden spider.
The Orb Weaver is the spider with an orange back and black diamonds on its back. It is not aggressive and not venomous.
The black spider with reddish-orange on its back is a redback spider. These Australian spiders are members of the same family of spider as the black widow and have highly dangerous venom.
The Black Widow Spider has either a yellow, red, or orange hourglass, but sometimes can look like a dot. Links: http://mysite.verizon.net/vzer75kc/
It may be a Black and Yellow Argiope, which is a common orb web spider. Follow the related link to see a picture.
It Is A Mexican Spider
Sounds like a banana spider, they are rampant in the South (USA) in the summer.
Black and yellow argiope perhaps?
It's a garden spider.
North American garden spider.
A spider that is mostly black with some orange on its belly and back is called a black widow. This design only applies to the female black widows.
Possibly the Black and Yellow Argiope (Argiope aurantia)
A black widow spider is black with a red mark on it's abdomen; this might or might not be what you meant. The black widow sometimes has a red mark on her back, as well. The red backed spider of Australia, a relative of the black widow, has an orange red mark on the back.
It was probably just a red back spider which you probably just hallucinated. ( Thought it was orange. )
The type of spider you want to stay away from.
Some type of insect with 6 legs a black or orange spot on it's back and is problly a spider...
Where do you live? I have a spider with that description on my back porch, I'm feeding him fies :)
Could be a Black and Yellow garden spider, common the US west coast.
Yes it is a poisonous arachanid.