I never knew so many pride flags existed!

This info comes  from  Comics  by  Xan!

The rainbow flag, commonly known as the gay pride flag or LGBT pride flag, is a symbol of lesbian, gay, bisexual and transgender (LGBT) pride and LGBT social movements. Other older uses of rainbow flags include a symbol of peace. The colors reflect the diversity of the LGBT community, as the flag is often used as a symbol of gay pride during LGBT rights marches. While this use of the rainbow flag originated in Northern California’s San Francisco Bay Area, the flag is now used worldwide.

Originally devised by San Francisco artist Gilbert Baker, the design has undergone several revisions since its debut in 1978, first to remove colors then restore them based on availability of fabrics.  The most common variant consists of six stripes: red, orange, yellow, green, blue, and violet. The flag is typically flown horizontally, with the red stripe on top, as it would be in a natural rainbow.

Gilbert Baker (June 2, 1951 – March 31, 2017) was an American artist, gay rights activist, and designer of the rainbow flag (1978).