Google has a lot of interesting and useful easter eggs. But besides them, there are some that are not entirely unambiguous for ordinary users. This includes the current one.
It can be found in online Google Sheets. To do this, it is necessary in one line in each separate column to indicate in order the letters from the word PRIDE.
An example is shown in the screenshot. After entering the columns will be colored B multi-colored 6 colors: red, orange, yellow, green, blue, violet.