I need new hair to dye.

OK, so basically I love dying my hair and I’ve dyed it like five colors within probably like the last year, and for most of those hair colors, I had it really really long and then it started getting damaged and so I cut it and I dyed it black and now it’s really short and black, but I already wanna dye it agajn and I can’t dye the hair I have now because there’s so much other colors underneath, I need help guys I don’t even care if it’s like thick or healthy. I just want longer hair.