css-animations

I'm new to JavaScript, and working on a startup application. I'm trying to write code that will cause an animation to execute multiple times (in sequence) on the same text element, with the text changing between animations. The text chan

i wanna make the images go from right to left on my screen, but it has to be like a rainbow so in the middle it goes up and goes down but i cant get the rainbow effect i tried to play with the numbers to make sure when its at the middle