When i turn on my laptop it boots from the flash drive that i have the files on but then it only shows a line of text and i left it for more than an hour and it didn't change at all.
My best suggestion, based on the information you give, would just be to:
-format the flash drive (FAT32)
-re-download the iso file
-place the new iso file onto the flash drive
-try booting and installing again
If that doesn't work, try using a different flash drive if you can. I honestly have no idea what would cause this and I am a complete noob to technology in general compared to some on this site, but sometimes just starting over clean helps.