system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the six color rainbow an LGBT symbol? What happened to indigo?
gpt
The creator of the flag redesigned it when it looked awkwardly placed when hung vertically on lamp posts, obscuring the center stripe with the post itself. It also used to have hot pink, but getting enough fabric of that color proved difficult for mass production at the time.