Newbie here...

Been reading the forums..
But, being a newbie i got alittle confussed..lol
I've done a couple standard swirl tie-dyes, but i perfer black shirts over white..
So first question..
How do i do a swirl tie-dye where all the undyed parts of the shirts are black?
Do i take a white shirt and dye the swirl and THEN dye it black also? wouldn't this dye the parts i just did also though?
or do i take a BLACK shirt and tie it up and then bleach it out, and then dye the swirl?
Second question..
I want to take a black shirt and bleach out designs/words like this..

did a test shirt already.. bleached it pretty well.. so i believe the dye would look good on it.. but how do i dye it to look like..

do i just take the black-bleached shirt and swirl it like normal and then dye the swirl like normal? would the colors show on a black shirt?
Basicly want to be able to see that its a swirl where it goes through the bleached parts of the designs/words. but DON'T want to see the colors on the black parts of the shirt..
Please explain to the newbie!
