Rainbow flag!

rainbow-flag.css

/* Pastel shades of: red, orange, yellow, green, blue and purple */
.rainbow-flag {
  background: linear-gradient(180deg, #f28560, #f28560 16.67%,
                                      #f2b560 16.67%, #f2b560 33.33%,
                                      #f2cd60 33.33%, #f2cd60 50%,
                                      #56d88c 50%, #56d88c 66.67%,
                                      #60c1f2 66.67%, #60c1f2 83.33%,
                                      #bd93d8 83.33%, #bd93d8);
}